Wow that's pretty bad. You've never seen that before you upgraded to El Cap 10.11.5? It may be a pain, but I would definitely submit a case with Apple for that...they really should see that.
Are you running a video at full screen or something? You said it happens at least twice a day, I'm curious to find out what it is you're doing when it occurs.
Are you running a video at full screen or something? You said it happens at least twice a day, I'm curious to find out what it is you're doing when it occurs.
Wow that's pretty bad. You've never seen that before you upgraded to El Cap 10.11.5? It may be a pain, but I would definitely submit a case with Apple for that...they really should see that.