I heard that only some brands of bluetooth keyboard/mouse doesn't work well with Catalina. (Have disconnecting problem). Does the ones that come with an iMac work well?
I recently upgraded to Mojave, but the problem of taking a long time to wake is unbearable. Some people suggested doing something with the terminal but it seems quite complicated. I would just switch to a different OS.
Even Apple mouse is problematic. I have indeed some lag issues and a disconnecting/reconnecting mouse with Catalina. With the latest version of Catalina (.3), the pb has not disappeared, I lost my mouse for a couple of seconds several times per day. My MBpro is just in front of me on my desk, and the mouse never more than 4" from the right edge of my mac. With my old and venerable mid-2010 macbook pro, I never lost the mouse, and the mac was 40" from my mouse (a first generation Magic Mouse, with 2 rechargeable AA batteries).
My external keyboard is an Apple, but not wireless. Old-style, USB cable+ USB-C adapter connected to the new MBpro.
Cheers
Lfaa
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