Apple has begun selling redemption codes for OS X 10.7 Lion and OS X 10.8 Mountain Lion on Apple.com. Each code costs US$19.99 and allows the buyer to redeem that code inside the Mac App Store so they can download the OS. At first, the move may seem an odd one since anyone can download OS X 10.9 Mavericks for free, but as TechCrunch notes, the sale of the older OSes compensates for the lack of availability of those versions of OS X on the App Store:
We did some asking around about the thinking behind this particular arrangement and the nut of
