MBPr hard drive space

[dmw16]

I have a MacBook Pro Retina and as is the case often with SSD's, space is critical. Especially since I have a Bootcamp partition.

Anyway, I've transitioned from Aperture to Photo and as such I moved my 109GB Aperture library to my backup drive and deleted it from my internal hard drive.

The weird thing is, it only freed up about 15GB of space. Is there active compression that happens in OS X? Not sure why I didn't free up much space...

 

[Tegeril]

OS X keeps a local time machine instance for time spent between now and when it can synchronize with its assigned time machine drive. It may be storing changes until they can be committed / expire out of that local instance.

 

[Essence_of_War]

OS X keeps a local time machine instance for time spent between now and when it can synchronize with its assigned time machine drive. It may be storing changes until they can be committed / expire out of that local instance.

You should be able to confirm this if you check out "About this Mac" and go to the "disk" section. If this is the case, and I suspect it is, you should still see a pretty big chunk of space taken up by Time Machine.

Edit: Alternatively, there is a great little piece of software called "Disk Inventory X" it's free-as-in-beer and free-as-in-freedom and is a port of the kdirstat algorithm to osx (done by a guy who is a friend of the guy who did WinDirStat!) it gives you a really nice graphical representation of what is taking up space on your filesystem.

For reference, I don't think OSX and the HFS+ filesystem support transparent, filesystem-level compression.