Aloha everyone. I have a mid 2012 MBP retina. Here is my problem. When I look in my "About this mac" I have 165.65 GB free out of 250.14. So its saying that I am using 84.49 GB. 41.61 GB is in that mysterious "other" category. When I run omni disk sweep or disk wave, they say pretty much the same thing in the summary areas, which is to say that i'm using around 85 GB.....but when I look through all my files with either omni disk or disk wave, and add up what is there to see, my total used space is only around 42 GB. Soooo what is taking up the other 40 something GB of space? Can anyone help?