Mac Convert to APFS
 - Mac: Formatting a Drive with APFS
Convert Mac HDD, SSD, USB Flash Drive
(APFS macOS Journaled HFS+) to Windows (NTFS exFAT or FAT32)
Convert to APFS Option is not Available or Greyed Out in macOS
How to Convert to APFS on macOS High Sierra




volume
,
!

boot

Mac


Command+Option+R
3 2 ,


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Safe Mode



error Support


Mac issue apple.com/support-2006f





Command+R reinstalls the version most recently installed


Command+Option+R will install latest version, Catalina