Good to remember if you use a tool like MCPF to install an 'unsupported' newer OSX. Keep a bootable clone of the original 'supported' OSX of that computer with its original unhacked Recovery Partition, for instance in a USB key or an external drive. The 'special' Recovery Partition ('OSX Hackers') created by the hacking tool in Mavericks can be used for re-hacking (if needed) or for doing again a 'clean install' of the newer hacked system.

However, it doesn't give you access to a Time Machine recovery as found in a normal Recovery Partition. (Sometimes Time Machine refuses to start and work normally from inside the hacked new OSX). The original kept 'old' Recovery Partition will allow you to boot from it and restore the newer system (if needed) from a Time Machine backup of it. I tried it for several months without success. Mavericks worked in my MB 4.1, early 2008, Yosemite not. Then one day I run this tool choosing Yosemite and directing it to an external USB stick as the installer, and afterward repeated the Yosemite choice but this time pointing to the inner drive of my MB 4.1, leaving the USB stick installer plugged in. A double procedure with MCPF 1.0.1.įor unknown reasons to me, a reboot allowed me suddenly to begin to install Yosemite. I don't know if it might work for other users or for other unsupported macs but in despair maybe you give this double procedure a try. I later succeeded to upgrade to the last version of Yosemite 10.10.5 and to install a security update. However I had to use each time the AppleHDA kext of the OSX Hackers kext package to have again recognized the built-in microphone and speakers, 'disappeared' after an update.

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