I don't understand why to use linux(Lack Adobe creative suite and many other softawares though could be run via Wine but with a performance glitch) and Windows(For developers ?? :P) when there is OSX is already doing a very good job.
Not every web developer does web design. If you only code, there's no advantage to using OSX.
Judging from your other comment, you have already picked OSX. If it works better for you thats all that matters, but its silly to pretend that you can't comprehend why other OSs exist. The answer is simple, not everyone likes the same thing.
Agreed but to code as well there are much better alternatives ex. Text mate, although you can use Sublime. And one more thing I'm not judging Linux or windows but I think OS X can be better if all you want is best of both the worlds(my case).
OSX sounds like a good match for you. Honestly, if I had the cash, I would probably get a Haswell rMBP, so I could potentially run all 3 OSs. I'm a security analyst, so its nice to be able to run everything without any compromises.
Unfortunately, I didn't have enough for a rMBP, so I ended up spending a third of the cost of a 13" rMBP on a Thinkpad so I could run a dedicated Linux machine.
That being said, if someone just happens to prefer Linux, you really can't beat a Thinkpad from the T, X or W series'.
