I purchased my 13" Retina MacBook Pro in late '13 (right after the refresh). The computer's been excellent so far, definitely a huge improvement over my Mid 2010 15" MBP. For the past several months I've noticed a strange issue. I have a discrepancy between what different programs report as far as my disk space is concerned. As you can see, Disk Utility, the finder Info pane and Grand Perspective all report different numbers. I think Grand Perspective has the most accurate reading. I've gone into recovery mode and used Disk Utility to verify and rebuild Macintosh HD, but I'm still having this strange issue. Any ideas?