Mac OS X is definently not owned by microsoft, there are parts of it that run programs designed by microsoft, but still what system doesent have atleast 1 thing with a microsoft application on it, all platforms are using something from them, either way Mac OS X is still soly owned by and made by Apple developers. Besides i think its a good thing now that computer companies are starting to form applications for all platforms. Mac Platforms running bsd such as OS X are 100 times more stable too, i can vow for it im running it right now.