Continuing the discussion from About the SketchUp category:
It has become almost impossible to switch tabs cleanly in Sketchup 2021 Mac. When you select a tab, the new drawing half loads and switches back to original tab. It will not stay on the tab that you choose unless you keep your mouse perfectly still for many seconds after the sluggish switch is completed… and even then it probably won’t work.
This problem started in SU2020. This would drive anyone nuts. Most unprofessional come presentation time.