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Apple Computing Products:
macOS - Operating System
Catalina on 2013 iMac
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<blockquote data-quote="MacInWin" data-source="post: 1840399" data-attributes="member: 396914"><p>Going back is not trivial. You will need a TM backup from Mojave, and I have read that it has to be not one that has been updated by Catalina, to get your data back. You can also use a cloned backup. Because of the structural changes in Catalina on the hard drive, you will have to completely erase it to get back to a Mojave setup. However, I think the slowdown is the APFS on a spinner HD. APFS was created to operate best on SSDs, can be slow on an HD, particularly on a slow spinner. And Mojave uses APFS as well, so if that is the issue, Mojave will be slow as well. Can you update the drive to an SSD? Even a 500GB SSD would be sufficient, given that you have only used about 225Gb on the current drive.</p></blockquote><p></p>
[QUOTE="MacInWin, post: 1840399, member: 396914"] Going back is not trivial. You will need a TM backup from Mojave, and I have read that it has to be not one that has been updated by Catalina, to get your data back. You can also use a cloned backup. Because of the structural changes in Catalina on the hard drive, you will have to completely erase it to get back to a Mojave setup. However, I think the slowdown is the APFS on a spinner HD. APFS was created to operate best on SSDs, can be slow on an HD, particularly on a slow spinner. And Mojave uses APFS as well, so if that is the issue, Mojave will be slow as well. Can you update the drive to an SSD? Even a 500GB SSD would be sufficient, given that you have only used about 225Gb on the current drive. [/QUOTE]
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Apple Computing Products:
macOS - Operating System
Catalina on 2013 iMac
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