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Old 02-18-2020, 06:35 PM
stevejobsson stevejobsson is offline
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Question SuperDuper says I must update to APFS

I recently updated my MacBookPro (mid-2012) from Mojave to Catalina (10.15.3). When I tried to perform a SuperDuper backup to my usual external HD, SD said I had to reformat the HD from HFS+ to APFS first. I'm puzzled, since Mojave required the internal HD to be formatted as APFS but left the external HDs as HFS+. Have the rules changed for Catalina? My other non-Catalina Macs still have their SuperDuper external drives formatted as HFS+.
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Old 02-18-2020, 07:06 PM
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dnanian dnanian is offline
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You must use APFS for Catalina boot volumes. See for a discussion ("Breaking the tape").
--Dave Nanian
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apfs, catalina, external hard drives

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