Bounces in keyboard output after upfate to Catalina 10.15.4

alberti-nl wrote:

• After conversion to Catalina 10.15.4 my iMac misbehaves on my expensive iMac with fusion drive..

I have a magic keyboard, as sold with the iMac 21 inch Retina Fusion.

Often, my keyboard bounces, like entering a string of spaces (ten twenty?)instead of only one. Also this happens with the key left or right is used to navigate forward or backward in a safari page like flickr. then an arbitrary number of images are quickly shown (ten, twenty?). This can also happen with a trackpad or mouse. Or when I fill in a password then not all keystrokes are recorded immediately, so when I immediately hit enter I get an error.

Also the response is slow, what I called 'TELEX type speed' such that when I type something it will take time for a response, sometimes it happens that when I type a vowel, the various variants (a, à, ä, â) appear just before the 'a' is finally shown or sometimes it just takes a second or so before a word or letter is shown.; the typing process always is with a certain delay, as if there is a buffer that is not read or that the fusion drive is not working under Catalina.

There are alot of other issues like this: selecting a file, deleting it and then another or two files are deleted. Thsi has been reported by me many times.

I have had contact with support and others have told me also to:

Restart in Safe Mode; then you will be fine

• Reset NVRAM and other internal keys.

But this all does not work. It remains the same.

The computer cannot be trusted (deleting more files than selected because the buffer is still filling with files while what I saw on the screen was only one file when I hit cmd-del) and also when typing the text does not appear but after a time lag, but if I have replaced my cursor in the mean time, the change is in the new location.

In America I would try to file a suit. I hope that makes my frustration clear.

I spent quite some money to upgrade programs before the upgrade to Catalina and I do not want to revert back to an older MacOS.

I have had quite some tips but nothing helps.

Call (800) MY–APPLE (800–692–7753)

or on line https://getsupport.apple.com/

alberti-nl wrote:

After a week, the keyboard behaves well, I keep the USB connector placed in the keyboard.

Response is quick now. No telex type response anymore. Waking from sleep is fast now.

So sorry for thinking it was the fusion drive (some info led me to believe that).

Goos computing alberti-nl !