Hi! I'm sure there is a very easy fix to this problem but my main HDD system drive has very little space left ("6" GB left) and upon checking storage 74.2 GB is taken up by games. Going into the games folder though I see that only around 2-3 GB is being used. The problem is definitely from game data, but from where?
I have a great idea. What a wonderful time to blow away everything, reinstall your Mac OS, put on the essential editing and graphics software you need, and don't use this computer for games at all. Then you will have a wonderful, fast editing/graphics computer with no bloatware in it.