1) Mac OS X, truly the world’s most-advanced OS
So—even if you don’t care for the Apple reputation, the brand’s so-called snob appeal, or whatever else you dismiss about the product—the additional cost factor is NOT a legitimate argument after factoring in the utility, practicality, and value of Mac’s included software.
You consider the most basic of software $500 worth?
Facetime, I'll admit, not sure about that outside of the dozens and dozens of free softwares out there that do the exact same thing. Garageband, no idea but I would assume since it is Apple that this is a pretty looking voice recorder? Well, I would actually assume it does a lot more, probably a basic sound composer which does cost money on Windows, but then it is a professional program which people actually release million dollar songs on... but still.
The rest? Windows comes with all that as well. Who would pay for a mail client, seriously? Guess what comes with Windows:
1) Windows, the number one used OS on the planet.
6) Photo viewers
7) Windows Movie Maker
8) MS Paint, which is actually a pretty dang powerful graphics program, all things considered. You may laugh, but with the basic tools it provides, people come up with amazing things.
9) CD and DVD burning software
10) Zipping programs
And guess what? This ALL comes with a basic purchase of one little disk. Amazing~~ If you are an infomercial person who can't even plug in a blender without being confused. This stuff is basic. Are you happy if your Mac O/S also comes with print drivers? Oooo, I bet it uses your mouse and keyboard right out of the box? Oh! Can it display images on that shiny screen? ooo.
Honestly, don't sell it up. Mac OS may have some stuff that is interesting, but don't reach to far into the bucket to try to show it better than Windows. And if you want "most advanced OS" I would have to throw a bone to all the Linux users. Mac OS is actually one of the least advanced as far as the user side of things, and in fact is given points for being so simple. What -you- may do with it is advanced, but the OS itself is designed to be Krampus proof and therefore limited. You want advanced, try almost any flavor of Linux, while I didn't enjoy it I certainly understood the appeal of having an OS that you could do anything you wanted on.
Again, if you like the Mac OS, that is fine. It is pretty, and it has some odd random things, such as the ability to copy your entire HDD onto the desktop, if you wanted to do so for whatever reason, but I guess it shows how it handles file systems. The design is bubbly, and it is pretty optimized for the specific stuff that Apple says is allowed to run on it. That is really as far as it goes, however.