I’m having a problem with Photoshop... When working, sometimes I have to get up and leave the room. When I return, I find that the file I was working on is frozen. Brush tool won’t work. Lasso won’t work. I have to shut everything down. When I restart, it’s all back to normal. OR, I will be using the brush tool, and it stops making marks. I wait, try again, and it makes a mark like I was using a mouse instead of my Wacom pen, and I was clicking to make straight brush lines. Again, shut down and try again. I can’t think of anything I am doing to trigger this behavior, but it is getting to be annoying. This has only started happening in the last couple of weeks. What’s going on? I’m using a Mac with the latest OS, and the latest version of Photoshop. Please help.