Why am I getting strange color lines over the rendering window? they seem to be there since I updated to Captain
Since I updated to the Captain I have noticed that over the rendering window where the % is, there are weird lines, like color and error lines. That is not normal at least as far as I know. Is there any way to fix that?
I really appreciate the help anyone can give to me.
Mac Pro, OS X El Capitan (10.11)