This is a bit of an odd one for me, I'm hoping someone here might have some advice. We have a couple mac users in the office, and a few of them have been reporting this box has been appearing sporadically. Any advice?
This is on a MBP 11,5, I've checked most of the accessibility settings, mouse settings, tried a different mouse, the issue still persists.
EDIT: Still no luck, I haven't had a lot of time to troubleshoot but after messing with pretty much every accessibility setting I'm fairly convinced its not that, going to try a new monitor in a desperate attempt.
EDIT 2: I haven't been able to find a solution to this issue, any help at all is greatly appreciated!