Ranked in these QuestionsQuestion Ranking
Pro Free upgrade
Unlike upgrading from Windows 7 to 8, upgrading ones Mac to Yosemite is completely free.
Pro Take phone calls while on computer
Don't feel like getting up to find your phone while gaming, with OSX it is no longer an issue, as long as an iPhone is connected wirelessly to the computer it does not matter if it is next to you as you can take the call right on the computer, meaning no need to get up from the current game being played. This can also work as an easy method of in game communication with friends.