This may be a bit of an oddball question, so I apologize in advance. When I got my new MBP, it came installed with Mavericks. (which I was quite happy about, as I had thought that there was no way it wouldn't come with Yosemite) However, it's got 10.9.4 on it, and I know that Mavericks (to my knowledge) is currently at 10.9.5. My question is hopefully a simple one; is there any disadvantage to keeping the unit at 10.9.4 or, in other words, does 10.9.5 break anything significant/have any major issues to warrant not updating the OS? I appreciate any and all assistance in this matter, so thank you!