Welcome to Camera Bits Forums
I’m getting a strange anomaly with the latest version of PM plus- a little black square appears on the screen when Photo Mechanic is running - like a hot pixel but much larger than a pixel (although still relatively small) and always black in color. It doesn’t move when you scroll and if you switch over to another screen (I’m running PM in full screen mode on my MacBook Pro) it disappears, return to PM and it reappears.I’m on a 2017 MacBook Pro 15in running the latest Catalina updates with 16 GB RAM 2.9 GHz i7 - graphic card is a Radeon Pro 560 4GB VRAM (and intel HD graphic la 630 1536 MB).