factory reset

swa44 Said:

”factory reset: How do I factory reset my Macbook Air Pro”

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Go Here: How to reinstall macOS from macOS Recovery - Apple Support.

You would reinstall the macOS that came with your Mac, or the closest version still available. Boot up holding down these four buttons simultaneously: [Shift + Option + ⌘ + R]

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For Note:

Backing up your Mac:

Are you Concerned of Losing Data?

• If not, just move ahead and erase the disk and then install the macOS

• If so, back up your Mac: (using Time Machine)

How to Use Time Machine:

Create a Time Machine backup of your Mac, so that you can have something to restore your Mac from, should anything go wrong with the reinstall.

Click here and follow the instructions. If the computer originally shipped with Mac OS X 10.6.8 or earlier, when you reach step 6, connect its original install thumbdrive, restart with the C or Option key held down, use the Disk Utility to erase the internal drive, and install a fresh OS.

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swa44 Said:

”factory reset: Thanks we will sell the mac once it is factory reset, so data loss is not a concern.”

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You are welcome.