After updating latest patch on High Sierra 10.13 on a 2012 MacBook Air, I can no longer copy and paste text. I restarted computer, booted into safe mode, tried copy and pasting in various applications like Textedit. If I do 'cut', the text goes away but clipboard in Finder shows it's empty.
Activity Monitor shows pboard and pbs processes exist. I killed it and a new one appears with same problem. The problem happens using keyboard shortcuts as well as using menu. When I do
Command-c, The Edit menu blinks blue while I do that. Drag and drop text works fine. Mouse keys are turned off. I don't have virtualbox. I don't have Copied or additional clipboard software installed.
How can I determine what the problem is? This was working fine yesterday.
Update: Copy and paste was fixed by restoring from Time Machine backup. Reapplying the same High Sierra patch worked fine after that.