Since I updated to OS Sierra, for some odd reason the brush cursor in Photoshop has stopped showing up. It functions, but I can't see it. At all. No, my caps lock is NOT on. I've tried toggling it on and off just to play with it, but no matter what I do the cursor doesn't show. No matter what preference I select, it doesn't show. It flickers briefly if I zoom in and out, but it doesn't stick around. I'm using an iMac, Apple keyboard...no reason for this that I can see. I haven't changed anything other than the OS update which I'll admit can be a huge deal. I can't figure out what broke and, more importantly, how do I fix it? It's impossible to do good work without being able to see the cursor.