Slow Graphics-new iMac M1

I’ve got a strange problem that has cropped up. I’ve got a new iMac 24" 2021 with M1 chip, 16 GB Memory, LPDDR4 Memory.

Sketchup has been working properly for a few months since buying. Suddenly I’ve got a graphics issue and the curser is following me all over with these little squares, whether its making a line or measuring as this jpeg shows.

So SketchUp 2021 has been working fine and since it hasn’t changed recently, I would expect the graphics drivers. Maybe in a recent operating system update.

What happens if you change settings in Sketchup’s Preferences>OpenGL?

Here’s what I’ve got Dave…

Try turning off Use fast feedback.