Apple Releases Mac OS X Lion, Updates Air

steffann was one of several readers to note that Apple has released OS X Lion for $30 available only through the Mac App Store. It's a 4 gig download so you better not be in a hurry. Lots of new stuff both cosmetic and functional. But if you're the sort of person who is going to install it today, then you already know what they are! They also updated the Air lineup, dropping the old white MacBooks entirely.