Edit: After half day, my wife’s Mac started having the same problem. I have then applied the solution that I found in the Apple
Pixelmator 2.0 Is Released !! –
Pixelmator a popular photoshop look alike has been updated to the new 2.0 version! The new Pixelmator has new updated drawing tools and a somewhat new look. So far it looks amazing and works better than the first one. I would suggest you get it now when it is only $29 then get it later when it goes to $60 so go get it in the mac app store. QUICK!