After login, which is normal with a background desktop image, my iMac opens the desktop screen with a flickering black/desktop image background. The desktop icons appear, but I can't access the dock. I can select things OK and shut down as normal. Sometimes after restart, it launches as normal. Sometimes I have the same issue. I have tried resetting the NRAM/PRAM and reset of SMC, these seem to work for a while but the problem occurs again. I also checked my startup items and removed 'Acrobat Collaboration' again, OK for a while, but the problems is still occuring.
My iMac is running Big Sur 11.7.9, it's a Retina 5k, 27-inch 2017. Processor 3.8GHz Quad-Core Intel i5.
Many thanks.
My iMac is running Big Sur 11.7.9, it's a Retina 5k, 27-inch 2017. Processor 3.8GHz Quad-Core Intel i5.
Many thanks.