Erase content for macOS Catalina
How do you erase all content on a macOS Catalia?
iMac Line (2012 and Later)
TMG059 Said:
"Erase content for macOS Catalina: How do you erase all content on a macOS Catalia?"
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Installing a macOS Clean:
A. What is the Model of your Mac?:
Note that an Apple computer cannot install a macOS that was released prior to the date of manufacturing. So, if El Capitan was released prior to this model, then this is not an option. So, what is the year of this MacBook Pro? To find out: Go to: Applemenu > Select: About This Mac > View: Second Line-Down.
B. What is your macOS Version?
If you need to get an older macOS version, refer to this link: How to Get Old Versions of macOS - Apple Support.
C. Reinstalling the macOS:
Go Here: How to reinstall macOS from macOS Recovery - Apple Support. Important: Be certain to create a backup of your Mac prior to all of this. That way, you can have something to restore from the Mac from, should anything go wrong with the reinstall. Once reinstalled, try this once more.