Thanks for the replies. This is on Mac OS 10.14 There was nothing going on in the application that would have left the document in a pending state. I opened a bitmap (photo) and it was sitting there. I could draw a selection rectangle, but Command-X didn't copy and Command-D didn't deselect. I imagine there were lots of other hotkeys that didn't work. Later, after I made the original post, I went back and these functions magically worked. But a short time later, Quit was disabled as were lots of other menu items; again, I hadn't done anything to invoke a pending state in the document. Photoshop was probably in the same state I experienced the first time. You mentioned having the program become unresponsive, and I thought I'd document these issues in case they're related. There's no further information at this point. There was no identifiable impetus for the failure or the recovery.
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