When Apple released OS X 10.8 Mountain Lion yesterday, it quietly removed the option of purchasing it’s predecessor, 10.7 Lion. This is nothing really new; once a new version of the software is released, older versions generally are no longer sold.

For many, this shouldn’t be much of a problem; you can still go from 10.6.8 (the minimum OS for using the Mac App Store, where you purchase Mountain Lion) right to 10.8 for the same $20 that you’d pay for a 10.7-10.8 upgrade, and it installs the same way.

If your Mac is running an earlier version than 10.6.8, you’ll have to upgrade to that version first – the trick will be finding a 10.6 installer, as Apple no longer sells this online; though you may have some luck at your local Apple Store or at a reseller.

Whatever the case, if your computer is capable of running Mountain Lion, especially if you’re running 10.6.8 or later, the upgrade path is fairly straightforward. Article Continues…