Step 1: log out everywhere There are multiple apps that require an account. For example, iMessage and iCloud. Check all apps and log out. Especially if you’re reselling or getting rid of your Mac. This works differently in each app. For iCloud, the process is as follows:
- Click the Apple logo in the top left corner of your screen.
- Select System Preferences.
- Choose Apple ID and then iCloud.
- Uncheck the box for the option Find My Mac.
- Click Overview in the side panel.
- Complete the process and select Log Out.
Step 2: boot macOS Recovery macOS Recovery Boot your Mac in Recovery Mode via the following steps:
- Turn off your Mac via the Apple logo and Shut Down.
- Press the on/off button and hold it down.
- Once the Apple logo appears, press and hold the on/off button again until you see Loading Startup Options.
- Select Options and Continue.
- macOS Recovery will open.
- Choose an administrator account and log in.
Step 3: erase the boot drive
Erasing the boot drive
You can now erase the boot drive from your Mac. Keep in mind that this erases all of your files, accounts, and apps. Follow these steps:
- Click Disk Utility in the utility window.
- Select the drive you want to erase.
The boot drive is usually listed at the top and is called ‘Macintosh HD’. - Click Erase above the menu.
- Keep the name ‘Macintosh HD’ and use structure APFS
- Click Erase if you don’t see the option Erase Volume Group.
Step 4: reinstall macOS
Reinstall macOS
After erasing the drive, you can move on to the final step. This is reinstalling macOS. Follow these 6 steps:
- Click Reinstall macOS.
- Select Continue.
- Choose a boot drive and click Install.
- If you get to choose between Macintosh HD or Macintosh HD – Data, choose Macintosh HD.
- When the installation is complete, you restart your Mac.
- Wait until your Mac has finished the reinstallation. This can take a couple dozen minutes.
- Do you see the start screen? Go through the steps or turn off your Mac if you’re reselling it or getting rid of it.
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