[vrishabh]

IMO innovation doesn't always mean coming up with a completely different genre of products. Here's an excerpt from the wikipedia entry on innovation. Innovation is the creation of better or more effective products, processes, services, technologies, or ideas that are readily available to markets, governments, and society.

OSX and iOS are definitely BSD derivatives with an exception that using them for a normal user is not equivalent to herding cats.

Apple is perfect combination of a mainstream and real innovation. GUIs are the best example which were originally developed by Xerox, but it was apple to innovate on top of that GUI concept to make it work for the masses.