I can’t figure out why this started recently…but as a long time Mac guy I must be missing something.
2019 27 Inch iMac that was recently upgraded to Big Sur from Catalina. OWC TB3 RAID and a bunch of USB drives attached with Bluetooth Apple mouse, extended keyboard, and trackpad.
I’m pretty sure this started with Big Sur.
I’ll be typing away or moving the mouse and suddenly it loses focus on whatever I was previously doing…typing into a text box on a web page, having a certain section of System Preferences active…and it’s happened twice (well, twice by the time I typed that word but another 3 or 4 times by the time I was down with the mail) while typing this email although command tabbing out of Mail and back in restores the active window and cursor remains where I left it.
Login items are pretty sparse…Launchbar, Printopia to share printers (although I’m going to check and see if I still need that since BS can share printers on the network natively now), DropBox, Music, and the CCC user agent to run scheduled jobs
I’ve looked through all the applicable system preference panes and nothing jumps out as being the cause…hence the question.