I've been using Photoshop CC on and off. I have Mac OS 10.9.3. Today, I tried to change an image and the image was locked. Usually not. Finally figured out how to unlock it. Then when I tried to make layers, the screen would go black even though it shows in the layer. Somehow, I managed to work around that, but then when I selected the type tool, it went black again. I tried several times, but can't see the image. I finally flattened it and saved it even though I couldn't see it. I then reopened the image, the changes are there, but again, I can't edit it or it goes black. What gives? Never ran into this before. I don't remember inadvertently hitting some button. Any ideas? Nothing else has changed, same computer, same everything.
Try disabling GPU drawing in Photoshop's preferences, then restarting Photoshop.
If that works, then the problem is the video card driver. MacOS 10.9 has some problems with it's video card drivers on some devices, and they haven't all been fixed yet.
thanks, Chris. I'll check it out this evening. W