MacBook (Late 2008 Aluminum, or Early 2009 or newer).Mac OS X Mountain Lion is compatible with the following Macs: Mac OS X Lion is compatible with Macs that have an Intel Core 2 Duo, Core i3, Core i5, Core i7, or Xeon processor, a minimum of 2GB RAM, and 7GB storage space. Apple recently dropped the $19.99 fee for OS X Lion and Mountain Lion, making the older Mac updates free to download, reports Macworld.Īpple has kept OS X 10.7 Lion and OS X 10.8 Mountain Lion available for customers who have machines limited to the older software, but until recently, Apple was charging $19.99 to get download codes for the updates.Īs of last week, these updates no longer require a fee, and can be downloaded from the OS X Lion and OS X Mountain Lion support documents on Apple's website.