I read somewhere that it is possible to install the latest version of OSX 10.10 Yosemite on my Mac, even though the official installer refuses to install.
Download OS X El Capitan. The Application Install OS X El Capitan will appear in /Applications. STEP 2: Create a Bootable USB Drive with UniBeast. Take a deep breath and take your time- this is pretty simple, but it's easy to miss things if you rush. Follow each step to the letter. Insert the USB drive. With that out of the way, follow the steps below on how you can clean install OS X El Capitan on your Mac. Create a bootable OS X El Capitan USB flash drive.
Can you give me any directions ?
Installing newer versions of OSX on slightly older Macs that do not meet the official system requirements can be done using MacPostFactor (MCPF).
Os X El Capitan
MacPostFactor also supports installing OSX versions up to OSX 10.10 Yosemite on older Macs. And a new version that supports installing OSX 10.11 El_Capitan is in the works.
For more info (and downloads), go to the info page on MacRumors.com :
or see the (less readable) official page of the MacPostFactor team :
…in short :
Install El Capitan On Old Mac
!!! THIS IS FOR (RATHER) EXPERIENCED MAC-USERS ONLY, AND SHOULD NOT BE DONE ON YOUR ‘ONE AND ONLY’ MAC !!!
!! REMEMBER : DO FOLLOW THE COMPLETE INSTRUCTIONS THAT CAN BE FOUND HERE : MacPost Factor info page on MacRumors.com
…that should be it !