Select any other internal volumes in the sidebar and click the delete (-) button in the toolbar. (If you see an Erase Volume Group button, click that button instead.) Select Macintosh HD in the sidebar of Disk Utility and click the Erase button in the toolbar.Ĭlick the Erase button in the new window. Start your MacBook in macOS Recovery mode: press the Command-R keys while booting your Mac and release them when you see an Apple logo or other image.Įnter your administrator password as requested.įrom the macOS Utilities window, select Disk Utility and click the Continue button. Once you have signed out of all the signed-in apps, you can remove all data on your MacBook. Click the iMessage menu and choose Preferences.In the Apple ID window, click the Sign Out button and confirm your action.Ĭlick the Apple menu > System Preferences > iCloud > Sign Out.
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