MacOS X 10.15.7 Today I purchased a subscription to Sketchup Pro. I downloaded it and ran the installer. It seems to be be installed. When I double click to start, no windows appear, nor any menu bars. When I hit Cmd-Option-Escape to get to the Force Quit window, the app shows in the list as if it is running, but there is no user interface visible.
I followed the installation instructions carefully. I have also downloaded 2020 and 2019 versions, installed them, and have the same issue.
Rfrazier121 was the first case where I had seen this combination of issues. In his case he had a non-admin user that failed to open SketchUp at all, but when logged in as admin, SketchUp ran ok.
I had him sign in as admin, run SketchUp to the point that he was signed in, and everything was working ok, then copy the ~/Library/Application Support/SketchUp 2021/ folder to the Shared user. After that he logged in as the non-admin, copied the folder from the Shared user, to ~/Library/Application Support/ (which would be the non-admin user’s support folder). After that, SketchUp ran ok on the non-admin account.