Ever since OS X Yosemite came out, everyone has been looking to see if they can find all of the hidden features not so widely reported by Timmy up on his stage.  So I decided to go a-hunting and see what I could find. After much hunting, here are the that I personally found useful, in no particular order. I have highlighted the word useful because I have missed ones out that I think are not useful. Because useful is what were all about here at MakeUseOf.