How to create yourself a backdoor to downgrade OS X

In a few days Apple will release a new major version of OS X. This year it is OS X El Capitan and as in the last years with Yosemite and Mavericks the upgrade is free of charge and will be distributed via the Mac App Store. Though most of us are excited to try the new version, not everyone is aware that Apple doesn’t allow a downgrade. So once you have upgraded to El Capitan and not everything is running as you expected it, there’s no out of the box path to go back to your previous installation of (Read more...)