catalina operating system erased from my macbookair
how to reinstall my MacBook air operating system that was running off of Catalina OS
MacBook Air 13″, macOS 10.13
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dxfbjvzkhjisbxvjklddhfklj Said:
"catalina operating system erased from my macbookair: how to reinstall my MacBook air operating system that was running off of Catalina OS"
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Reinstalling the macOS:
Go Here: How to Reinstall macOS from macOS Recovery - Apple Support
Important: First, Back Up your Mac:
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. Take this as a learning experience, knowing to always create a backup of your Mac, prior to making any major changes to it (i.e. update installation)