MacBook Pro Retina not refreshing storage

What is this "Other" in the storage tab? What is eating up my space? by theSeb

To find out, where you storage capacity is being used, you can use the following free applications:

• DiskInventory X
• OmniDiskSweeper
• JDisk Report
• GrandPerspective

Maybe try a combination of several, if you still can't find the "missing" capacity.

 

What does the Finder say? Does the Finder show that you have more memory storage than MacKeeper?

If yes, then what you're noticing is Time Machine local backups. These are backups made so that you can quickly restore files even when you're away from your Time Machine storage disk, and they can grow to be quite large in size. For example, I noticed that mine took up 144 GB at their largest on a 500 GB disk. The third-party disk usage monitors that I've used don't seem to distinguish the backups from other space, but the reason why Finder does is because those backups are deleted by the system to make room for other things. In other words, it's taking up space on the disk, but the OS regards it as second-class storage that will immediately be deleted to make room for your data, should the need arise. This is why the Finder counts it as free space.

If it bothers you, local Time Machine backups can be disabled using an application like Chameleon SSD Optimizer.

 

What things did you delete then? Did you empty the Trash and restarted your Mac yet? Have your disabled local Time Machine backups as the first link I gave you explained?