After I wake the computer, and try to use an already open Photoshop CS6 window, I get strange patterns in the canvas. Purples. Greens. And when it's empty, it goes all black. A restart fixes this, until sleep. Happens every time. Anyone know a fix? Thank you.
CS6. Mac OS 10.10 Yosemite.
You are experiencing some of the video card driver bugs in MacOS 10.10.
Turn off GPU drawing in Preferences, and restart Photoshop.
If you need to use GPU based features, consider downgrading to a more stable version of MacOS.