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  1. #16
    Catalina on 2013 iMac
    Nighthawk4's Avatar
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    Maybe Catalina is too demanding for my iMac?

    Everything, if it works at all, is so slow.


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  2. #17
    Catalina on 2013 iMac
    Lifeisabeach's Avatar
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    Quote Originally Posted by Nighthawk4 View Post
    Maybe Catalina is too demanding for my iMac?

    Everything, if it works at all, is so slow.


    Sent from my iPad using Mac-Forums
    How much RAM do you have? What type of drive? What size drive? How much used/free?

    Please verify and include the exact model/year of your Mac and OS X version number (available from "About This Mac", then "More Info" on the Apple menu).
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    Links: Onyx | Find Any File | Apple Hardware Test | How to test your hard drive | DetectX: Malware monitoring and removal | Uninstall MacKeeper
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    Lifeisabeach - Mac-Forums Member of the Month June 2009, Feb 2012, and March 2013.

  3. #18
    Catalina on 2013 iMac
    Nighthawk4's Avatar
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    Back to Mojave I think. Perhaps a 2013 iMac with Intel graphics is too old for Catalina.

    I have managed for years with my original 2008 iMac running Lion, so Mojave isnít that bad


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  4. #19
    Catalina on 2013 iMac
    Nighthawk4's Avatar
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    Catalina on 2013 iMac
    8GB of RAM, 1600 MHz DDR3
    Intel Iris Pro 1536 MB
    Late 2013 iMac 21.5 inch 2.7 GHz Quad core i5

    1TB with 776 GB free SATA drive using APFS


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  5. #20
    Catalina on 2013 iMac
    MacInWin's Avatar
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    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.
    Jake

  6. #21
    Catalina on 2013 iMac
    Nighthawk4's Avatar
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    It is an iMac so not really upgradable.

    Mojave refused to update unless I changed the drive to APFS, but it did not seem at all slow running Mojave. However, Catalina is desperately slow.

    I suspect the problem is the hardware rather than Catalina itself, with an i5, a traditional hard drive and Intel graphics.

    I am hoping that the method I used to upgrade Mojave may be successful - boot onto external drive, wipe and SuperDuper! back again.


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  7. #22
    Catalina on 2013 iMac
    Nighthawk4's Avatar
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    Just a thought. As I have Mojave fully updated on the clones, would it be better if I donít stay with APFS?

    If that is the case, what do I choose instead please?


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  8. #23
    Catalina on 2013 iMac
    harryb2448's Avatar
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    For mine always do an erase and clean install, then use Migration Assistant to backup from one of my external SSD's. mUpgrade after upgrade can cause problems imho.
    Using OS X.7 or later make a bootable USB thumb drive before running Installer!

  9. #24
    Catalina on 2013 iMac
    Nighthawk4's Avatar
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    Harry, that is what I am planning. However, should I stick with APFS on my traditional hard drive or go back to the older format, since I assume I will be staying with Mojave due to the age and rubbish graphics and drive on my iMac?


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  10. #25
    Catalina on 2013 iMac
    IWT's Avatar
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    @Nighthawk

    I'm prepared to be proven wrong, but I'm almost certain that macOS Mojave requires the Mac's HD to be formatted APFS - SSD, Fusion or Spinner.

    APFS started with macOS High Sierra; but only for Macs with an SSD. With macOS Mojave, all Internal HDs needed to be formatted as such.

    So, if you want to "go back" to macOS Mojave, you're stuck with APFS as far as I know. See this link and look under "Support": Apple File System - Wikipedia

    Ian
    Ian

  11. #26
    Catalina on 2013 iMac
    Nighthawk4's Avatar
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    Thanks Ian. I had a feeling that was the case, but very useful to have that confirmed before I start.

    Something to do later this evening


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  12. #27
    Catalina on 2013 iMac
    Nighthawk4's Avatar
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    Now copying back from the clone with SuperDuper.

    One question - it has created a volume inside a container on the internal disk. It appears to be working so far and copying into the volume.

    However I donít remember seeing that last time I created an APFS Drive.


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  13. #28
    Catalina on 2013 iMac
    MacInWin's Avatar
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    That is how it works. If you don't remember it, you might want to look into vitamin supplements to help that memory!
    Jake

  14. #29
    Catalina on 2013 iMac
    Nighthawk4's Avatar
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    Hehe Catalina on 2013 iMac


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  15. #30
    Catalina on 2013 iMac
    Nighthawk4's Avatar
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    iMac 2.66 GHz 20", iPad Mini2 32GB, iPhone6 64GB, Watch Sport 42mm Black, iPad Air 2 128GB
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    Successfully back to Mojave. Initial tests seem good.

    Thanks for the help again.


    Sent from my iPad using Mac-Forums

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