So the free space is inaccurate even when you empty the trash? If so, then it's what happens to me, too, every now and then. It usually involves large files. I'd delete them but my free space indicator would hardly move at all. I'd empty the trash, run Clean My Mac, and the free space would barely budge. Not sure if it's an OS or SSD issue. But like you, I just restart the Mac and this usually clears up the issue. But since you mentioned it's not working this time, I'm pretty stumped. Anybody here with an alternative solution?