how do i make sure my computer is erased?
getting my old computer ready to trade in. how do i make sure my computer is erased?
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• How to erase a disk for Mac - Apple Support
https://support.apple.com/en-us/HT208496
Erasing your disk: For most reasons to erase, including when reformatting a disk
or selling, giving away, or trading in your Mac, you should erase your entire disk.
Instructions involve restarting in macOS Recovery to use macOS Utilities, etc.
[Other options How to Re-install macOS from macOS Recovery - Apple Support]
Good luck & happy computing!🌞🐝