Можно восстановить заводские настройки Mac. Для этого выполните стирание Mac, а затем переустановите macOS, используя встроенную систему восстановления Mac — режим восстановления macOS.
Важно! При стирании тома вся информация с него удаляется. Перед этим создайте резервную копию необходимых файлов и информации на запасном устройстве.
Ваш компьютер должен быть подключен к интернету. При выполнении переустановки на ноутбуке Mac подключите адаптер питания к сети питания.
Запустите компьютер в режиме восстановления macOS.
На Mac с процессором Apple. Выберите меню Apple
> «Выключить», нажмите и удерживайте кнопку питания, пока не появится надпись «Загрузка параметров запуска», выберите «Параметры», нажмите «Продолжить», затем следуйте инструкциям на экране.
На Mac с процессором Intel. Выберите пункт меню «Apple»
> «Перезагрузить» и сразу же нажмите и удерживайте сочетание клавиш Command-R.
В окне приложения «Восстановление» выберите «Дисковая утилита», затем нажмите «Продолжить».
В боковом меню Дисковой утилиты выберите том, который нужно стереть, и нажмите кнопку «Стереть» на панели инструментов.
Введите имя тома, нажмите меню «Формат» и выберите APFS, а затем нажмите «Стереть группу томов».
Когда операция будет выполнена, нажмите «Готово», затем выберите «Дисковая утилита» > «Завершить Дисковую утилиту».
В окне приложения «Восстановление» выберите «Переустановить macOS Big Sur», нажмите «Продолжить», затем следуйте инструкциям на экране.
Use macOS Recovery to reinstall the Mac operating system.
Start up from macOS Recovery
Turn on your Mac and continue to press and hold the power button until you see the startup options window. Click the gear icon labeled Options, then click Continue.
Make sure that your Mac has a connection to the internet. Then turn on your Mac and immediately press and hold Command (⌘)-R until you see an Apple logo or other image.
If you’re asked to select a user you know the password for, select the user, click Next, then enter their administrator password.
Select Reinstall macOS from the utilities window in macOS Recovery, then click Continue and follow the onscreen instructions.
Follow these guidelines during installation:
- If the installer asks to unlock your disk, enter the password you use to log in to your Mac.
- If the installer doesn’t see your disk, or it says that it can’t install on your computer or volume, you might need to erase your disk first.
- If the installer offers you the choice between installing on Macintosh HD or Macintosh HD – Data, choose Macintosh HD.
- Allow installation to complete without putting your Mac to sleep or closing its lid. Your Mac might restart and show a progress bar several times, and the screen might be empty for minutes at a time.
After installation is complete, your Mac might restart to a setup assistant. If you’re selling, trading in, or giving away your Mac, press Command-Q to quit the assistant without completing setup. Then click Shut Down. When the new owner starts up the Mac, they can use their own information to complete setup.
Other macOS installation options
When you install macOS from Recovery, you get the current version of the most recently installed macOS, with some exceptions:
- On an Intel-based Mac: If you use Shift-Option-Command-R during startup, you’re offered the macOS that came with your Mac, or the closest version still available. If you use Option-Command-R during startup, in most cases you’re offered the latest macOS that is compatible with your Mac. Otherwise you’re offered the macOS that came with your Mac, or the closest version still available.
- If the Mac logic board was just replaced, you may be offered only the latest macOS that is compatible with your Mac. If you just erased your entire startup disk, you may be offered only the macOS that came with your Mac, or the closest version still available.
You can also use these methods to install macOS, if the macOS is compatible with your Mac:
- Use the App Store to download and install the latest macOS.
- Use the App Store or a web browser to download and install an earlier macOS.
- Use a USB flash drive or other secondary volume to create a bootable installer.
Looking to reset your Mac to its factory settings? Here’s how to wipe data from your Intel-based and Apple silicon-based computer and start over again.
Mac computers are generally reliable. But as with any computer, sometimes things go wrong. Before you spend big on a new Mac, though, try a factory reset, which wipes your computer and reinstalls a clean version of macOS. A factory reset is also the best way to prepare your old computer for a new owner to make sure no leftover data falls into the wrong hands.
The process has been the same for years on Macs with Intel processers, however, the move to Apple silicon has slightly altered the method for wiping and reinstalling the operating system. Here’s how to erase your hard drive and reinstall the operating system on your Mac, whether it has Apple’s M1 chip or features Intel components.
Enter Recovery Mode
In order to access the options for wiping your data and reinstalling the operating system, you need to enter macOS Recovery. However, with the release of the new Macs, there are now two different ways of doing this, dependent on the chip inside your computer.
For Intel-Based Macs
For Macs with an Intel processor, hold down the power button, then choose the Restart option from the pop-up menu. Otherwise, open the Apple icon in the top-left corner of the screen and choose Restart. From here, hold down Command + R until the Apple logo appears. Release the keys and allow the Mac to boot up and open into Recovery.
For Apple Silicon-Based Macs
Macs using Apple silicon require a different method where you must actually turn the computer off completely. Open the Apple menu and select Shut Down or hold down the power button and select Shut Down from the pop-up menu. Hold down the power button to turn the Mac on again and hold for several seconds until you see “Loading startup options.” Select Options from the startup screen to enter macOS Recovery.
If you’re in a predicament where your computer is frozen and the normal means of resetting aren’t working, try the Control + Command + Eject (or power button) shortcut.
Erase Your Data
No matter your method of getting here, you must then select a user with administrator privileges and enter their account credentials before gaining access to the computer’s startup options. Once fully in macOS Recovery, select Disk Utility to wipe the hard drive.
In the Disk Utility menu, choose the drive Macintosh HD under the Internal heading and click Erase in the top toolbar. A dialog box will pop up asking for the drive name and format. Keep the name as Macintosh HD and make sure the format is set to APFS or Mac OS Extended (Journaled).
Click Erase Volume Group (or Erase if that button isn’t shown) to wipe the drive, then make sure any other internal drives are also erased in order to completely wipe the computer and avoid any errors during the reinstall process. Exit out of the Disk Utility window to go back to the Recovery screen.
Be aware that once this process is done, you will no longer be able to recover any deleted data that was left on the drive. If you think you may still need what is on your hard drive, we advise you to first back it up through Time Machine or sync important files to iCloud.
Is it time to sell or give away your old Mac? Or do you just want a fresh start to clean up your machine? Here’s how to securely delete all of your files, then install a fresh version of macOS.
If you’re selling or giving away your computer, this is the only way to make sure whoever ends up with your Mac can’t access to your files, and won’t have to deal with any modifications you’ve made to macOS over the years. Don’t just delete your user profile and call it a day—you’ll want to completely wipe it.
Before you start, make sure you transfer any files you want to keep to a new computer or external drive. Even if you don’t intend on wiping your drive, it’s a good idea to back up before re-installing your operating system.
Step One: Boot From Recovery Mode, or an Installer
Your Mac’s Recovery Mode is a treasure trove of useful tools, and it’s the easiest way to wipe your computer and start from scratch. Shut down your Mac, turn it on while holding down Command+R. Your Mac will boot into the recovery partition.
If you’re using an older Mac (from 2010 or earlier), there’s a chance that you can’t use Recovery Mode. On those devices, hold “Option” while turning your computer on, then select the recovery partition instead.
If neither of these options work, don’t panic! You’ve got a couple of options yet. You can access recovery without a partition using Network Recovery: hold Command+Shift+R while turning on your Mac and it will download the Recovery features for you. Failing that, you can create a bootable USB installer for macOS Sierra, and boot from that by holding “Option” while turning on your Mac.
Once you’ve managed to open up the Recovery Mode in some fashion, we can move on to wiping your drive securely.
Step Two: Securely Wipe Your Hard Drive (Optional)
If you want to re-install your operating system, but leave your files in place, you can skip this step. Your user accounts and files will stay exactly where they are—only your operating system will be overwritten. We recommend backing up files before you do this, just in case, but otherwise you’re ready for step three.
If you want a truly clean installation, however, you need to first wipe your hard drive. We’ve shown you how to securely wipe a hard drive with your Mac, and doing so in Recovery Mode isn’t really different from doing so within macOS.
To get started, click the Disk Utility option.
Depending on how you started Recovery Mode, you may be presented with the option to start Disk Utility right away, as seen above. If not you can find Disk Utility in the menu bar: click Utilities then Disk Utility.
You’ll now see your list of hard drives. Click your primary drive, then click “Erase”
If you’re wiping a mechanical drive, click “Security Options” in the window that pops up. (If your Mac has a solid state drive, you can skip this part: your SSD will already securely erase files thanks to TRIM. You still need to wipe the drive, however, or your files will remain in place, so skip to the end of this step to do so.)
Now move the dial up, to randomly write data over your entire drive. You only need to write over a drive once to securely wipe it, but if you’re paranoid you can also wipe it three or five times.
Click “OK” once you’ve decided, but remember: if your Mac has a solid state drive, you do not need to use these options. Just give your drive a name (I recommend “Macintosh HD”, just for consistency’s sake), then click “Erase” to start the overwriting process.
If you opted to wipe your drive securely, this might take a while—30 minutes to an hour is not unreasonable for one pass. If you choose three or five passes, you might want to leave this running overnight.
Step Three: Reinstall macOS
With your information wipe complete, you are now ready to reinstall macOS. If you booted from a functioning recovery partition, click the “Reinstall macOS” button. The installation process will begin.
If you booted from an USB disk, click “Continue” to advance to the installer.
You’ll be asked which hard drive you want to install to. Choose the Macintosh HD you named earlier.
Just like that, macOS will begin installing.
This might take a while. Eventually your Mac will restart and ask you to create an account. If you’re giving your Mac away, or selling it, I recommend that you simply shut down at this point and let whoever you’re giving your Mac to create their own account. After all, it’s theirs now. Otherwise, enjoy your now-fresh Mac!
So you have finally decided to reset your Mac to factory settings. Maybe you want to hand over or sell it to someone else, or you are facing some serious lagging issues. Whatever the reasons are, maybe resetting your Mac to a factory setting is a good choice. But this comes with a huge compromising situation, you will lose all of the data present in your Mac permanently.
In case you have different versions of Mac such a MacBook, MacBook Pro, MacBook Air, Mac Mini/Pro, and iMac. The process of resetting Mac to its factory settings is no different.
Besides this, resetting your Mac will reinstall macOS from the scratch, this will clear all unknowing bugs and glitches present on your system. Therefore, you will no more experience any sluggish performance if you were experiencing it before.
In this article, we will show you how to reset your Mac to factory settings. So make sure to follow the simple guide till the end that we have managed to prepared for you. Without further ado, let’s get started.
Things To Remember before Resetting your Mac
Before heading towards our main topic there is a serious thing you should be aware of. Resetting your Mac will wipe out all the data present on your system. As mention, this process will re-install macOS from the scratch.
You never know when you will need your data in the future, so it is advised to backup your important data using iCloud or iTunes or in your external drive. Otherwise, you could lose your personal precious information permanently.
Steps to Reset you Mac to Factory Settings
This will make your Mac reset to its default original settings, your Mac will perform like a brand new one just like it was before. Follow the steps mentioned below:
Step 1: Restart your Mac.
Step 2: While restarting your Mac, press and hold Command + R keys together when you hear a beep to open your Mac in Recovery Mode.
Step 3: Once done, the macOS Utilities screen will show up, then select Disk Utility.
Step 4: From the left sidebar, select Macintosh HD or your system is named, and select Erase button.
From the next step onwards, all the data present on your Mac will be deleted. If you don’t want it to happen, now is the chance to stop the process. Also, recheck whether you have created a backup of important data.
Step 5: Now, a window will appear asking you for the confirmation to erase your drive. Here, a new name to your drive for example ‘Macintosh HD’. In the Formant section, choose to keep macOS . And, click on Erase.
Step 6: Let the process of data deletion be complete, leave the system for a sometime.
Step 7: Once done, exit Disk Utility window and go back to the macOS Utilities screen.
Step 8: Now, it’s time to begin to re-install macOS, select ReInstall Mac OS (some Macs have different option names like Install macOS), and click on the Continue button.
Step 9: Here, you have to choose the drive name that you have kept in ‘Step 5’, in our case, it was Macintosh HD, then click on Install to begin the process of reset Mac to factory settings.
After the installation completes, your Mac will perform well as new. You will notice that there will no previous data left as it wipes all the data present on the system.
Now you can sell or hand over your Mac to your one of the family member. It is always good to erase the data before selling or giving it to someone else, because who knows your data may get compromised.
Whenever you have a doubt that your Mac is lagging, performance issues, experiencing bugs or glitches. You can always reset your Mac to its factory settings. This will not help Mac to provide a better performance, but it will also fix unknown issues.
But before performing reset on your Mac, don’t forgot to backup your data.
That’s it for now, hope this helps! If you have any queries you can mention them in the comment section mentioned below. Till then, stay tuned for more info.
If you have a Mac and want to format it, you have reached the indicated post, since here we will explain how to format your Mac with or without a pendrive . In general, the Mac is formatted to perform a reinstallation of the operating system or update it, here the steps are completely safe.
In this article we will clear up your doubts as to whether you should use a bootable USB stick or if you can do it directly from the Mac. Well, we will develop both cases so that you have at your disposal two useful and practical tools when formatting your computer.
Reasons to format your MAC
There are several reasons that lead a person to want to format their Mac, and here are some of them:
- When you are going to sell your computer.
- To improve system and hard disk performance.
- To prevent your data from being stolen.
- To correct technical errors and conflicts in the Software.
Ready, you know why sometimes you have to do this procedure on your Mac computer, now we show you how to format it.
How to format and reinstall macOS on my Mac computer?
It is very common that the operating system of the Mac changes and that if you use one of this you want to have the latest version of the system. We recommend that you carry out a complete cleaning on the hard drive deleting everything, then installing the software from scratch so as not to drag errors.
Here are the simplest steps to perform a system installation using the Mac software:
- Completely shut down the Mac.
- While pressing the power button, you must simultaneously hold down the Command + R keys . Do not release the keys until the Apple logo appears.
- Once this appears you will find yourself in the tools or ” macOS utilities” .
- You will see a display of options, enter the “Disk Utility” . In this section you can delete all the information from the hard disk .
- Ready to format the disk, you can close the window.
- Once you see the window you had at the beginning where the “Disk Utility” menu is, there we will select “Reinstall macOS”. In case the software is not available, we recommend that you have a good internet connection so that it can download.
As you could already see, you can install the macOS software without the need for a bootable pendrive, this process leaves the system as new. This process should be run at least once a year, if possible when a new operating system is released.
And finally, we advise you in advance that you have or make a backup copy of the files you want to keep.
Format Mac with USB pendrive
Now we show you how to format safely while being simple with a bootable pendrive so that you have your Mac 100%.
- Connect a removable or external drive to your Mac PC to save valuable information like photos, videos and important documents, so you don’t lose them.
- Have on hand an OS X bootable pendrive with which you will install the macOS operating system.
- Turn off your computer and plug in the bootable USB and turn on the Mac, simultaneously pressing the ALT and power keys.
- Once the Apple apple appears, a menu will appear where you will look for the option «Start from USB drive.
- Then select “Disk Utility” to erase the contents of the hard drive.
- Click on the main hard drive in the menu on the left and select “Delete”.
- After a few minutes, depending on what is deleted, a message will appear indicating that everything has been deleted successfully.
- Close the «Disk Utility» window and return to the main menu, here you will press the option «Install macOS.
- The reinstallation wizard will help you, you must accept everything that the system requires . This process typically takes just 30 minutes or a little longer due to constant reboots required.
We have concluded this article where it was explained how to format your Mac with or without a bootable pendrive, these steps are safe. We hope that by following the procedures listed here, you will achieve your goal, as the goal is to assist you in an educational way .
Has your Mac computer been running into issues lately? It might be time to give it a fresh OS (operating system) installation. This process is actually straightforward and simple. Here’s how to reinstall your Mac operating system(OS).
Warning: Make sure you do a full backup of your files before you reinstall your operating system.
How to Reinstall Mac OS Using Recovery Mode
Using the Recovery Mode is an easy way to reinstall your Mac OS. Follow the steps below to get a new version of your operating system:
Note: Your Mac needs to be connected to the internet to install or reinstall macOS.
- Restart your Mac. You can do this by holding down the power button or by clicking the Apple logo by the top left corner of the screen and selecting Restart.
- As your computer is restarting, hold down the Command + R keys. Keep holding them down until you see the Apple logo appear on your screen. When the Apple logo appears, release the command and R keys.
- When you are in recovery mode, click Reinstall macOS and then click continue.
- When the installer window pops up, click Continue. You will be shown the terms and conditions for installing the OS. Click Agree and then select your hard drive in the next window. Click Install to initiate the process.
How to Install macOS By Wiping Hard Drive First
If you wish to do a clean installation of your Mac operating system, you will need to wipe the internal hard drive first. You should do this if you are selling your device or giving it to someone else to use.
- Restart your Mac.
- While your computer is restarting, press and holding the Command + R keys.
- Click Disc Utility and then click continue.
- Click View > Show All Devices.
- Select your Mac’s drive and then click Erase. This will be the highest option in the device tree.
- Click Erase and fill in the name, format, and Scheme.
- Name: You can choose any name you want, but it’s recommended to name the disk something generic.
- Format: You can choose either APFS (Apple File System) or macOS Extended (Journaled). The Disk Utility will show the compatible format by default. Most older computers will be Journaled, while most modern laptops that come with solid-state drives (SSD) are APFS-formatted.
- Scheme: Choose GUID Partition Map
- Select Erase by the bottom right corner of the screen. This step will start the process of wiping your Mac’s hard drive. This process will take a few hours, so make sure that your Mac is plugged in. When prompted, click Done.
- Once your data is wiped, you can then start the reinstallation process. If you are in the functioning recovery partition when you booted, you will see the Reinstall macOS option. Click the button, and the process will start.
This step will take a little while. When the process is complete, your Mac will restart. You can then create a new account. Skip creating a new account if you are selling or giving away your device. Leave that step to the new owner.
Installing a fresh copy or reinstalling the operating of your Mac is an easy process, as long as you are connected to the internet and your computer is plugged into a power source.
If you are having a problem with a specific application, you can learn how to uninstall programs from your Mac here.
Resetting Mac to factory settings offers a simple and effective way to counter MacOS problems. It is an easy way to wipe the Macbook of unwanted data and gives it a new life. Also if you are considering selling or giving away your device you should always Wipe your Macbook so that no one can access your data.
Are you wondering how to clean my Mac utilities app? Our guide here will discuss some of the efficient methods to reset Mac to factory settings. Read ahead to learn more about how to factory reset Mac and wipe away all your data from it.
Before performing a factory reset for your Mac device ensure that you have a proper backup so that no personal information is compromised and it avoids you from suffering any data losses. Also ensure that you sign out from iMessage, iCloud and other accounts before you factory reset your Mac device.
How To Completely Wipe A Mac | Methods To Factory Reset Mac
Resetting Mac to factory settings is an efficient way to give your old PC a new life and also offers an easy way to erase data and deep clear Mac devices to remove any leftover traces.
So, without wasting any more time, let’s learn from scratch how to erase everything from the Mac laptop.
1. Restart Your Mac Device
If you are trying to restore Mac to factory settings then restarting your device is the first step towards it. Doing this is exceptionally easy, just hold the power button until a dialogue box appears on your Mac screen, choose the Restart button from the list of options displayed.
Alternatively, you can also click on the Apple button located on the top left corner of your device screen and then choose restart from the drop-down list.
To reset Mac to factory settings you can also use keyboard shortcuts. Simultaneously press Control + Command + Eject button.
2. Open In Recovery Mode
Yet another useful method to reset Mac to factory settings. Open your device in Recovery Mode by pressing the Command + R key on the keyboard until the Apple sign appears on the screen. Doing this will boot your device in Recovery mode. Now enter the set user id and password to access the device. Here you can access help documentations, erase data, create Time Machine backup, install new OS and also repair all the damaged and problematic disks.
3. Erase your Data
Wondering how to reset Mac to factory settings, follow simple steps to get the job done. So, once you are finished restarting your device, it’s time to clear your Macbook along with the data stored on it.
- Under the Internal Headings pick the relevant startup disk.
- Now from the Disk Utility Window click on the Erase button.
- A new dialog box will appear on your Mac screen.
- To Wipe your Macbook, set the format to Journaled.
- Now click on the Erase button.
- Wait for the process to complete, Once it is done choose The Quit Disk Utility option from the top left corner of your device screen.
These simple steps provide an easy way on how to completely wipe a Mac device, but an important point to remember here is that once you erase your data you cannot recover it under any circumstances. So we recommend you to have a proper backup to avoid any data losses before you wipe your Macbooks.
4. Reinstall MacOS
If you are considering selling your Mac device you should be well aware of how to reset Mac to factory settings to avoid giving unwanted access to your private data to anyone else. The next step to factory reset Mac is to reinstall macOS on your device. For this follow simple steps as mentioned below:
- Launch the Mac Utilities Screen.
- Then select the Reinstall option and follow the steps as described.
- Doing this will install a clear version of the operating system on your Mac device.
5. Restore From Backup
So, once you are through following the above steps, now is the time to restore the backup to created before resetting Mac to factory settings.
Important Things to Do Before You Restore Mac To Factory Settings
Now that you have learned how to completely wipe a Mac, here are a few important points to remember. There are greater chances that you might suffer data loss while Wiping your Macbook, so if you don’t want to lose any important data here are a few recommended actions that you should be well aware of.
- Create Backup: Before your clear Mac ensure that you have created a proper backup of all your important files and data. Usually, people tend to underestimate this step but regret later on as once you factory reset your Mac device there is no chance that you can recover your data.
- Sign out of iCloud: Another important point to remember before you reset Mac to factory settings is to sign out of your iCloud account. To do so, open the Apple menu, then choose Apple ID from the System Preferences option. In the next step choose iCloud and deactivate the Find My Mac option. To finish, open the Overview section and click on the Sign Out button. Remember doing this before you device to reset Mac to factory settings.
- Sign Out of iTunes: This step does not hold any relevance for users who are working on macOS Catalina, but for others, it is an important step to remember while resetting mac to factory settings. Follow the steps to sign out of iTunes, Account > Authorizations > Deauthorize your device.
- Sign out of iMessage: Doing this is fairly simple, just launch the Messages app on your device, then choose the Messages option followed by the Preferences button. Select the iMessage button and finally click on the Sign Out button.
- Unpair Bluetooth: Another recommender step to consider before you Wipe your Macbook is to unpair Bluetooth connection. Apple menu> System Preferences > Bluetooth > Unpair all the connected devices.
Final Words: Factory Reset Mac | Wipe Macbook Completely
We hope our guide on how to completely wipe a Mac has been of great assistance to you and has been able to clear all your doubts around it. The above-mentioned step will help you reset your Mac to factory settings with utmost perfection and ease.
Last Updated On July 11, 2021 by Ghani Mengal Posted Under: How-To
If you want to sell your old Macbook or Mac, you have to delete all files from your computer. And in this guide, you will learn how you can reset your MacBook to factory settings.
The year 2021 can be described as the year the Super Macs came. Strictly speaking, Apple’s switch from the Intel platform to its own processors began at the end of 2020, with the iMac M1, the first really new model came in May. And in the second half of the year, we can expect new MacBook Pros and possibly a refurbished Mac Mini as well.
So, for many Mac owners, it is the perfect time to upgrade. Or should it be the established Intel Macs for a few more years, mainly because of their compatibility with Windows programs via The Boot-Camp or virtualization? But then, go to the Apple Store, there are still some interesting devices in stock, while the iMac Pro is the first one that has already disappeared from the range.
Whether your new Mac should be one of the first with Apple Silicon or one of the last with a core chip based on x86: The purchase of a new computer can be financed to a large extent by selling an older device. Apple devices may be a bit more expensive to buy, but their value is stable. Below you will learn how to reset your MacBook and erase all your personal data.
Clean Up Before Giving Away Or Selling
If you want to sell the old computer when you buy a new device, or give it away or otherwise pass it on within your family or circle of friends, the question arises: How do I actually set my Macbook back to the factory settings? In our instructions we clarify how you can reset your Macbook:
For Those Who Know Their Way Around And Only Want A Quick Overview:
1. Copy Your Data: Time Machine users can easily use their backup. After starting a new Mac for the first time, you will be asked if you want to restore your data from a Time Machine backup. This should of course be up to date and contain all data.
Alternatively, you can use an app like SuperDuper or Carbon Copy Cloner to backup a copy of your internal hard drive to an external hard drive. So you have access to all your old files and the copy can be restored at any time. By the way, cautious people can make a copy using both methods to be safe.
2. Remove Permission: Remove permission for your Mac in iTunes (macOS High Sierra and earlier only).
3. Turn off Filevault (if you are using it).
4. Recovery Mode: Start the Mac in the recovery system (keyboard shortcut Command + R during the boot process).
5. Erase Your Drive Using Disk Utility: Use Disk Utility to erase your hard drive. Click Disk Utility> Next. Select your main hard drive and choose “Erase”. Then quit Disk Utility.
6. Reinstall macOS: Click on “Reinstall macOS” and “Next”. Then follow the instructions to reinstall macOS.
Note: The steps and methods can be different for Intel and M1 macs. In the following, you can find detailed instructions.
Step 1: Clone Your Hard Drive
Before you erase all of your data from your Mac’s hard drive, you should back it up somewhere else. Or rather: clone, because you can easily restore your “backup” at any time. The best way to do this is with a special program like Carbon Copy Cloner or SuperDuper. You also need an external hard drive. Then simply select your internal hard drive as the source and the external one as the destination in the programs and start the copying process with “Clone”.
You should now also be able to boot from your external hard drive. To test this, restart your Mac and hold the Alt key while it boots. Use the arrow keys to select the external hard drive as the source and confirm by Entering.
The cloned hard drive can also be “cloned back” to the main drive if necessary. These tools can also be used to create a bootable copy of the M1 Macs on an external medium, but this is not a complete clone as no system files are copied. To start this clone you need access to an internal SSD of the M1 Mac, which in this case does not lead to any problem.
Step 2: Remove iTunes Permissions (High Sierra And Older)
Next, you need to unlink your MacBook or Mac from your iTunes account. After all, only five macOS devices in total can be linked to a single iTunes account – and you shouldn’t transfer this permission to someone else. Open iTunes and click Account> Authorizations> Deauthorize This Computer in iTunes / Music. Then enter your Apple ID and password and confirm your choice.
Step 3: Turn Off The FileVault
FileVault encrypts the files on your hard drive and is particularly important for users of mobile computers. Before you can take any further steps towards the factory settings, you must switch off the service, if you have activated it. You don’t need to worry about security, after all, your data will soon be deleted anyway.
Open System Preferences and click Security & Privacy> Filevault. Check whether Filevault is switched off for the hard disk in question. If it doesn’t, click the little lock icon at the bottom left, enter your password, and click Unlock. Then click on “Turn off FileVault”.
Step 4: Restart The Mac In The Recovery System
First, make sure you are connected to the internet as you will need an internet connection to reinstall macOS. Restart the Mac via “Apple> Restart” and hold down the Command (⌘) and R keys at the same time during the boot process. A window with the tools of the recovery system appears.
Step 5: Erase The Hard Drive
Select Disk Utility and click Next. Now select your main hard drive (usually named Macintosh HD) and click on “Unmount”. Now switch to the “Erase” tab and select “Erase” to format your hard drive. Keep in mind that the deletion process permanently removes all of your data from the hard drive – so do not take this step until you have saved all of the data you want to rescue! When the deletion is complete, exit the program.
Step 6: Reinstall macOS
Now click on “Reinstall macOS” and follow the instructions on the screen. This will install a fresh copy of macOS Big Sur on your Mac. DO NOT enter your Apple ID or password during installation; Leave this step of the installation to the future, for the new owner of the Macbook.
For Professionals Only: Delete The Secure Enclave
New Macbooks with Touch Bar has a special memory chip, the so-called Secure Enclave. A new installation from the recovery partition will delete this data, but a simple reformatting will not. However, you can delete the data stored here using the recovery partition.
Restart the Mac via “Apple> Restart” and hold down the Cmd and R keys at the same time during the boot process. Then enter the command “xartutil –erase-all” via the Terminal utility. After pressing the line feed you have to confirm this command with “yes”. There You Have It!