Hello everyone, Activa66 yes it's possible... I have downloaded the preinstalled Sierra image from the Mac OS HACKERS Sierra page(about 8GB), then repartitioned my HDD with Disk Utility directly on El Capitan, and then restored the image to the new partition(for some reason 30GB was not enough, I got an error not enough space, so I made the new partition 50GB and restored with no problem) then booted the new partition and I am able to boot to the Sierra, but my trackpad, keyboard and all USB devices are not working, I disabled SIP via the El Capitan Recovery, then in El Capitan ran the Sierra4you restarted but no success, tried to replace the LegacyUSBInjector.kext - no success and now a ran the Post Utility, from the Sierra patcher but again no success... Any idea guys? MacBook 5,1(Aluminium unibody late 2008).