I know this comes up a lot, and I've gone through many other posts on this topic, but I seem to be 'missing' space on my harddrive. I've got a Retina MacBook Pro, 500GB SSD. I've got screenshots below of the programs I've used (sorry I don't know how to put an image within the text). Basically, going About This Mac > More Info > Storage, I get the bar graph showing 193.0 GB of 'Other', and 96.21 GB of Free Space. I had wondered if this was being used by Time Machine Local Snapshots, which I understand 'delete themselves' as you add more data to your drive, so I started filling my computer with movies, but it only let me add 96 GB, ie the Free Space. So it's not Local Snapshots. I then ran Disk Inventory X, which shows the data on my drive taking up 251.5 GB, which should leave ~250 GB Free Space, so taking away the 96 GB that's definitely Free, it leaves ~150 GB 'missing'. I then scanned my drive with Daisy Disk, which shows the data on the drive taking up 403.1 GB (which leaves ~96 GB Free, so that's all good), but when you add up the numbers on the right of the image, they only add up to 267.3 GB - 135.8 GB missing... Finally I've used Omni Disk Sweeper, which shows 267.5 GB of data (which agrees with Daisy Disk). I then found this site: http://www.macobserver.com/tmo/article/how_to_recover_missing_hard_drive_space/ That shows 276.2 GB of data, so while it's a little larger, I'm still missing about 130-150 GB of data. One thought I've had is that it's 'leftover' space from Parallels. I installed Parallels recently, had some trouble with it, uninstalled it, reinstalled it, but the problems persisted, so I uninstalled again. I'm thinking that may be the problem? If anyone can help it would be greatly appreciated!