Lost password for a previously setup mac air, but not used in months.

ChamaPat Said:

"Lost password for a previously setup mac air, but not used in months.: How do i return the MacBook Air to factory settings?"

-------

Resetting to Factory Sessions:

Perform the following in the order provided:

I. If it applies:

Back Up your Mac First:  Be certain you Create a Time Machine Backup of your Mac, so that way you can have something to restore your Mac from, should anything go wrong with the reconfiguration.

Then...

II. Reinstall the macOS Anew:

1. Boot: into Recovery Mode.
2. Open: Disk Utilities
3. Delete: the partition
4. Reinstall: the macOS

Once Installed Anew...

III. Reinstall All the Software:

1. Use Migration Assistant to move Apps a Files back in.
2. Ask developers for new software keys - but contact the developers only --- none other --- or you may end up with malware and spyware installed.

Hi,

Boot up in Recovery Mode could reinstall macOS on your MacBook Air.

How to reinstall macOS - Apple Support