First of all, right-click on your desktop and select 'New' -> 'Folder'
Create a folder and name it something to distinguish it (say SI backup)
Once you've done this go to your Sports Interactive folder which by default is at the following location:
Users\[Your Mac Username]\Library\Application Support\Sports Interactive\Football Manager 2020
By default this folder is hidden, so to access you need to do as follows:
- Open Finder
- Click ‘Go’ from the menubar
- Press and hold down the ‘Option’ (Alt) key
- This will bring up the ‘Library’, click to enter then go to ‘Application Support’ -> ‘Sports Interactive’ -> ‘Football Manager 2020’
This should contain folders like 'games', 'crash dumps' etc. Please cut every folder EXCEPT 'Caches', 'cloud', 'Logs', 'Preferences', 'promo' and 'Temporary' from here and paste them into the folder you've created on your desktop.
Once you've done this and the Sports Interactive\Football Manager 2020 folder is now empty, launch the game. If it works, copy back the files from the desktop folder and hopefully it should now load without any issues.