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#CLEAN RE INSTALL MAC DISC DRIVE HOW TO#
How to reset NVRAM/PRAM using startup command: This RAM type will keep data for users after their devices are powered off. The NVRAM, formerly known as PRAM, refers to a small amount of special memory on Mac. If you're using macOS Mojave or earlier, please go to the Apple logo menu -> System Preferences -> iCloud -> Sign Out.
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Sign out of iCloud (macOS Catalina or later):