Are you wanting to downgrade Mac OS X 10.9 Mavericks to Mac OS X 10.8 Mountain Lion? Or maybe even further back, to Lion? The good news is that you can roll back your Mac to the operating system that was first installed on it using a Recovery Disk. Then our guide to rolling back the Mac OS X operating system to an earlier version has the information you need. First of all it’s worth noting that you cannot simply take Mac OS X back to an earlier edition and keep all of your files. When Mac OS X updates to the latest version it updates the file structure in apps like iPhoto, iTunes, Calendar, Mail and so on. Apple doesn’t create any system that enables you to roll back to an earlier version and keep all these files, so you can’t take these files with you. But it is possible to perform a clean installation of the older operating system, and you can also backup your current data and then
