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I just installed a new 2.0 TB SSD in my mid 2011 (12,1) 21.5" iMac to replace the original 500 GB HDD. The instructions recommended formatting the new disk with APFS but when I boot to recovery (cmd-opt-r) and select disk utility APFS is not a format option. After format I plan to recover from my Time Machine backup.
You must be using High Sierra or later to format APFS.
You must be using High Sierra or later to format APFS.
New SSD Format 2011 iMac
