Apple is constantly updating their OS's that screws so many software developers. You see it all the time when downloading Mac software "Not working on OS X XXXX, we are currently working on a new Beta version" then they get it working then Apple screws them again by changing things in yet another OS update.
Then you go to run a download app " Sorry XXX needs 10.9.2 to run you are using 10.9.1"
Then you update to 10.9.2 then you find other apps don't work anymore.

Windows, just always works.

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