I've been having problems with "ghost images" appearing over whatever I am working on. These are not tooltips, though they appear similar. It is usually the name of a file or folder somewhere on my computer. Sometimes it is tab arrows. (I've included several screenshots.)
At first this was happening only on my external monitor(s). I tried different monitors, different cables, and different adapters, but it made no difference. Now it’s happening on my MacBook Pro screen also. It happens nearly every day, though some days are worse than others. It happens in multiple applications, including but not limited to Finder, Mail, Safari, Acrobat, and Microsoft Word. This started after a system software update a few months ago.
I've tried to get help through Apple Support, but their first-line people are clueless and have been giving me bad advice. Worse, Apple Support employees have been unwilling to escalate the matter or ask their peers in the broader tech support or software engineering teams.
Any help would be appreciated.