I managed to install 10.10.1 on a Dell XPS 15z by creating a USB installer via the usual methods (copying BaseSystem.dmg), upgrading my current 10.9.5 installation via App Store, then booting into the USB installer...it recognizes that my Mavericks partition is awaiting upgrade right away and installs automatically. I'm using kext-dev-mode=1 to get all my kexts working, but for some reason USB 3.0 does not work. Anyone have any luck on this, or know why USB 3.0 in particular fails?
also, I used to be able to boot CD's in UEFI mode on the modded BIOS, but seem to have forgotten how to do it...can anyone refresh me? in BIOS options whenever I turn off legacy booting, my windows install CD just doesn't boot and my computer skips to the next boot option. I can boot in legacy and install windows in legacy, but then I have trouble getting Clover to boot the legacy OS (always says operation system not found).