Undo only sometimes works...


Undo only sometimes works...
I have been having this problem forever. The undo function does not always work. I have used the quick key (apple z) and the menu option - and often, nothing happens. Since the menu does not list what is being undone, it becomes a little creepy to keep hitting it. But oftten, after a few times of hitting the same thing - it finally works.
Any suggestions?
Just troubleshoot your system.  The problem is on your end.
If you updated or upgraded to the foul Yosemite 10.10 after Photoshop CS6 was installed, Yosemite damaged Photoshop.  The remedy is to uninstall CS6 and re-install it, then update it to Photoshop CS6 version 13.0.6.
Of course, it could be a faulty keyboard or who knows what else.
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