this is a strange one...i recently deleted a load of files to free up space on my macbook pro. i ended up with around 22 gig free. i turn off my mac, then later restart to find the free space has disappeared! i have run disk utility a number of times = no problems with the hd and nothing has changed i then ran cleanmymac = it just freed up a bit more space but no change really i have also just run disk warrior and rebuilt the directory = still no change i can't see anything on omnidisksweeper that could be the problem either... i have run out of ideas here...why would a mac have the free space, then not?!