The Problem: Photoshop hangs up every time you try to switch programs, and often gives you a strange error about the clipboard. Clipboard Export Error When Switching Programs If you are working in Quickmask mode (pictured above right) you can press shortcut key Q to return to normal, or simply click the icon in your toolbox. You should also be able to see if you are in a mask channel, another potential pitfall. If you are, click the combined RGB channel (pictured above, center) or the combined CMYK channel, if you happen to be working in CMYK. From there, Navigate to your channels panel, and check that you’re not working in a quick mask channel, or any other extraneous channel. Go to Select > Deselect if you have an area selected with the marquee tool that you might have forgotten or can’t see. The Solution: This can be one of several problems. The Problem: You’re trying to paint, erase, clone stamp, heal brush, etc, and Photoshop simply won’t make a mark on your canvas or let you use your tools like normal.

Your Brush Tool (Or Others) Have Stopped Working A single press hides all active panels, and a second one brings them back as they were, no need to reactivate them under the Window menu. The Solution: Normally, all panels are hidden by a quick press of the Tab key, often by accident. try to disable them with the Adobe Extension Manager, depending on your installation, you have to maybe run the Manager wih root, terminal: sudo (drag here the. > Sometimes Old Plugins could also crash PS. > Another issue could be messed up fonts, use FontBook to scan your fonts, remove all which are marked RED

But i forgot to maybe consider to reimplement the security thing mentioned in linked article. and i ran into another version of it, from one day to the other, PS crashed when i tried to use for e.g. > Font Setting in PS, set preview to small, if this isn´t set, PS will crash on using font tool, by rendering the font preview box > update to 12.0.4 or even 12.0.5 here you find a way to run 'old' incompatible updater. You have to consider serveral things that could be an issue I went through a crazy voyage with my CS5 Creative Suite PS Version,

Photoshop cs5 portable wont launch