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Old 04-23-2020, 11:42 AM
ashleykaryl ashleykaryl is offline
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Join Date: Sep 2009
Location: UK
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New drive for SuperDuper - No APFS option

I have recently ordered a new Mac mini with the idea of putting the Mac Pro into semi-retirement and I decided to order three new external drives for mini.

There will be a 1TB SSD for general data, a 1TB USB 3 for SuperDuper and a 2TB USB 3 for Time Machine.

I first tried the SSD in disk utility and found no option in Mojave to format as APFS, so I tried on my daughter's MBP running Catalina and there it appeared as an option by right clicking on the drive with a warning that the the drive would not be able to run on an older system, so I left it for the moment. The same option in Mojave was greyed out.

I have yet to look at the drive destined for Time Machine, which will remain as Mac OS extended, however I have the same issue in Mojave of not being able to erase and convert this to APFS for SuperDuper. I have followed the thread at, however it does not seem to work that way.

The mini is still being shipped, so no huge rush on this but I am a little perplexed, because I had no difficulty before converting drives to APFS, whether internal or external.
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