I'm beginning to think there is a fundamental flaw with Mac OS because I've had this with non-beta versions. I'm using a Mac Mini with Catalina. I've deleted a good 40 GB+ of space which I need to edit a video. However the space doesn't show up as available. Previously when I've had this happen using Mac the only way it's remedied is by updating the Mac OS software where it seems to see it and give the space back. I don't know when the next Catalina update will be, how do I get the space back?