If you are selling your MacBook or Mac, trading it in, or just passing it on to friends or family – you would be wise to wipe the Mac and restore it to factory settings first. This is partly so that your data stays safe, but it will also avoid any issues at a later date that could come about if you don’t disconnect that Mac from various services and software you might use. It also means the new user can restart the Mac as if it was brand new. Show
Just remember that if someone is going to be using the Mac after you, removing personal information alone isn’t enough – you also need to make sure there’s a working version of macOS installed afterwards. Read our guide to selling a Mac. Another reason why you might want to wipe your Mac is to perform a clean install of macOS – which can be a good way to fix issues with your Mac if it’s starting to behave oddly or you are worried you might have a virus. Wiping a faulty Mac will allow you to set it up like a new Mac – which will hopefully fix any software-related issues you are having. Follow our guide to do the following:
First a bit of good news: If you have macOS Monterey on an M1, M1 Pro, M1 Max, or a Mac with a T2 chip, the process for erasing the content on your Mac has just got so much easier thanks to a new option in System Preferences. We’ll run through the new steps below. Step 1: Back up your MacBefore you do anything you should back up or clone your Mac. This is because – as you would expect – resetting a Mac to factory settings gets rid of all the data stored on that machine. Don’t fall in to the trap we fell into: Because we use iCloud to sync all files across all our Apple devices we assumed that we could just recover everything we needed from the cloud – which was true to a certain extent, but it wasn’t until after we wiped the Mac that we realised that the data for one non-Apple app we used wasn’t in the cloud. In these days of working predominantly in the cloud it is an easy mistake to make! Unfortunately you can’t yet back up everything on your Mac to iCloud. Luckily backing up your Mac is easy to do – as long as you have a external hard drive to use. This can be done very simply using Apple’s Time Machine software – here’s how to back up using Time Machine. The best thing about backing up with Time Machine is it makes it really easy to move your data to a new Mac afterwards. If you don’t want to use Apple’s free Time Machine software, or you can make a clone of the whole hard drive using a program like Carbon Copy Cloner or SuperDuper (both are available as free trials). This cloned drive can be re-cloned back to the main drive if you decide to restore your Mac, or it can be used to access all the original files and transfer them and all your settings to your new computer. We have a complete guide that explains how to back up a Mac as well as this guide to the best Mac Backup Software. Step 2: Prepare and erase your MacYou know you need to erase the Mac before you pass it on, but before you delete everything there’s some more admin to do first. If you have a M1 Mac, or an Intel Mac with a T2 chip inside, and you are running macOS Monterey, this process is a little easier with many of the steps taken care of by a new option in System Preferences. If your Mac is older then the steps you need to take are a little more complicated, we’ll run though the steps for older Macs below. M1 Macs and Intel Mac with T2 chip running macOS MontereyIf you have a M1 Mac, or an Intel Mac with a T2 chip inside, and you are running macOS Monterey this process is a little easier with many of the steps taken care of by a new option in System Preferences. These Intel Macs have the T2 security chip:
How to erase an M1 Mac, or a Mac with T2 chipA new option arrived in System Preferences in macOS Monterey that takes care of a lot of the complicated steps involved in wiping your Mac – as long as it is an M1 Mac or one with a T2 chip, as detailed above. If you click on the new Erase All Content and Settings option then everything will be taken care of, including removal of your stored fingerprints for Touch ID, your Apple ID, anything in the Wallet app, and Find My. Activation Lock will also be removed and Bluetooth devices will be unpaired. It also removes all your data and user-installed applications.
How to prepare and erase an older MacUnfortunately if your Mac is older than those above, or doesn’t have Monterey installed (if the latter is the case then you will probably be better off updating the software first as it will make things simpler for you), you will need to run through the steps below: You need to disconnect the Mac from any services you are linked to. That means signing out of things like Apple Music/iTunes, iCloud, Messages, and Find My. For example, in the Music app (or iTunes in older versions of macOS) you will need to deauthorise your iTunes Store account and log out. This is important because you can only use up to five Macs to play music and movies that are locked to your iTunes/Music account. The method of deauthorising your music services varies depending on which version you’ve got.
2. Unpair Bluetooth devicesThis is especially important if you are passing your Mac on to someone in your home or office as any Bluetooth device that may have once been paired with your old Mac may connect to the old one again – which could be frustrating if you want to use it with your new Mac. It might also mean your new keyboard or mouse won’t work. 3. Turn off FileVault (if you use it)FileVault encryption can make it difficult for unauthorized persons to access the data on your Mac. If you are using FileVault to encrypt the data on your Mac before you delete your data and prepare the Mac for sale you should turn it off – this seems illogical as you want to protect your data, but you will be removing the data.
4. Reset NVRAMAnother way to be absolutely sure that none of your personal settings remain on the Mac is to reset the NVRAM. The NVRAM is a small amount of memory that your Mac uses to store certain settings. Resetting it will clear your user settings and restore any security features you might have adjusted. Here’s how to reset the NVRAM:
Note, you can’t reset the NVRAM on an M1 Mac in the same way. You can change the settings but you can’t reset it. However, you may not need to because it seems to be the case that the M1 Chip tests the NVRAM when the computer is started from shutdown (i.e. not after a normal reboot). If something is wrong with the memory it is reset automatically. We describe how to reset NVRAM in this article: How to reset NVRAM on an M1 or Intel Mac. Of course, if you have an M1 Mac you won’t need to do this step anyway. 5. Restart your Mac in RecoveryNow you have backed everything up, deauthorised your accounts and unpaired devices, you are ready to start to erase everything on the Mac. To do so you need to enter Recovery mode. This will enable you to wipe the Mac. How to enter Recovery on an Intel Mac
If you’re having problems because Command + R isn’t doing the trick, read this: How to reinstall macOS if Recovery won’t work. Note: The process by which you access Recovery on a M1 Mac is different to the process on an older Intel-powered Mac, but, because if you have an M1 Mac you will probably have used the Erase All Settings this shouldn’t be necessary for you. If you do want to enter Recovery on an M1 Mac, instead of pressing the Command and R buttons when you restart your Mac you will need to do the following:
We also detail how to access Recovery on an M1 Mac in this article: How to do everything on an M1 Mac. 6. Erase and reformat your MacNow you have entered Recovery you can erase your Mac. Again, the instructions are a little different depending on the version of macOS you are using and whether your Mac is Intel or M1. We’ll run through the method in Monterey, Big Sur and Catalina, before moving onto Mojave and previous versions of macOS below that. How to delete your Mac in Big Sur/Monterey on an Intel Mac
To make sure you delete everything you will need to choose Erase Volume Group, if you don’t see this option try the instructions below. How to delete your Mac in CatalinaWhen Apple introduced macOS Catalina in 2019 it added a new read-only volume where the operating system lives. This volume is Macintosh HD (yours may have a different name). Alongside it you will also have a Macintosh HD – Data volume. This is where your data resides. The reason Apple separated the two volumes in Catalina is to ensure that critical operating system data can’t be overwritten. Because of this extra volume the process is a little different to how it works on older Mac.
How to delete your Mac in Mojave or earlierThe process for deleting and reformatting your Mac is slightly less complicated in macOS Mojave or earlier as there isn’t the second Data volume to delete first. As above, start up in Recovery.
Step 3: Reinstall macOSThe next step involves reinstalling macOS – you can’t just sell your Mac having erased the contents – if you do the new user will be confronted with a flashing question mark when they start up the Mac because there will be no operating system installed. You need to reinstall macOS before you can sell it on. If you have an M1 Mac, or a Mac with the T2 chip, this will be handled by the Erase All Contents and Settings option in System Preferences, as detailed above. But if that isn’t an option for you then the below guide should help: How to reinstall macOSWhether you are reselling the Mac, or just planning to continue to use the Mac and just wanted to do a clean install you will want to install a version of macOS. You should still be in macOS Utilities as per the steps above.
How to install an older version or downgrade macOSThe method above will work if you want to install the latest version of macOS installed on the Mac. It won’t upgrade you to the latest version if you aren’t already running it. There are other options if you want to install a different version of the macOS. Instead of pressing Command + R at start up you could press Shift + Option/Alt + Command R (if you are running Sierra 10.12.4 of later) to install the version of macOS that came with your Mac, or the one closest to it that is still available. (Command + R won’t work on an M1 Mac). Alternatively you could make a bootable drive containing the version of macOS that you want to run and install it on your Mac using that. Read how to do that here: How to make a bootable macOS installer on an external drive. If you need to install an older version of the Mac operating system and are wondering how you can do that if you haven’t got the original discs, read this: How to install old versions of macOS or Mac OS X. We have another article that goes into more detail on how to install an older version of macOS using Recovery mode. Does factory resetting a Mac delete everything?A factory reset will wipe your Mac computer, restoring its software to the state it was in when you first turned it on. That means that all your personal files and data will disappear.
How do I wipe my Mac and reinstall?Boot into macOS Recovery. Power down your Mac if it's on.. Press and hold the power button to turn it on and continue to hold it until you see the startup options.. Choose macOS Recovery.. Select Reinstall macOS.. Follow the prompts.. |