SketchUp Lagging

I recently downloaded SU 2021 and today updated my mac to Big Sur. Before I updated the operating system I was getting tons of bug splats in both SU and Layout- now since I updated my OS I have not had any bug splats but SU is almost impossible to use (my tools all lag terribly making it almost impossible to do anything) I am using models that I have scanned and sent to canvas which are then sent back to me as SKP files that I edit for interior design work. Although I"ve been using SU for years I haven’t had these issues and because I’m not tech savvy I have NO IDEA where to start to fix. HELP