I have a mid-2011 13" MacBook Air (MacBookAir4,2 with Intel HD Graphics 3000).
Since installing Mountain Lion I sometimes encounter a problem when I move the mouse cursor over the dock to click something.
Sometimes I get pinwheeled, sometimes I don't.
Whenever the problem occurs:
- there appears a 75% transparent label for a dock item
- I can continue to move the mouse
- the computer does not recover, I resort to a forced shutdown.
There doesn't seem to be any common denominators yet, other than it always happens as I mouse over the dock.
Is there a log or anything I can look at to rectify the problem?