My Catalina is slow - telex type speed

My Catalina is slow, even after several days,. It is getting slower too, it seems. I switched from Mojave.


Hopping between programs takes a second or more, the bar with open apps takes a few secs to load, and switching takes another few secs. Opening mail takes time.

Then as I type here even, the display is behind a few words or letters. Remember the telex? I do. This is maddening.

I normally only have a few apps open.


iMac 4K with the standard 8 Gb. Fusion drive, that really should behave better in the new release.


iMac 21.5" 4K, macOS 10.15

Posted on Feb 4, 2020 4:32 AM

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Posted on Feb 10, 2020 6:07 AM

I keep my fingers crossed, I think I solved it.

I had an NTFS partion (formerly used for Bootcamp) and reformatted that to AFPS with disk utility. Can't totally get it away, but that can be done later I think with the repartition tool. 

  • Probably Catalina has a problem with such a partition.


Now the machine is fas like it should. Have Safari and Firefox active, Lightroom -making outputs, am browsing photo collections, and everything stays OK. 

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My Catalina is slow - telex type speed

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