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Apfs/hfs
So, I have a new iMac still in the box
I boot from my HFS SD! backup of old Mac
And write everything over to the new mac
Then upgrade the new Mac's OS if needed
Then, when the new Mac is running properly
I should reformat the SD! External drive as APFS
And then back up the new Mac to the external drive
Or is it unnecessary to reformat the drive?
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