Been using Illustrator CS6 for years and now recently on a new 2018 MacBook Pro. Has worked fine until this afternoon when every time I tried to save a file, the cursor would start spinning and I would have to force quit to get out. Lost a lot of work. Tried reinstalling, same thing. Tried signing out of iCloud (which was one of the answers posted). Didn't work. Out of options but must use my Illustrator. Please help!