Sorry to butt in with such a noob issue, but I'm having a desperately mind-boggling time upgrading from 10.8.0 to 10.8.4. I was able to update a couple times, to both 10.8.2 and 10.8.4, but now on fresh reinstalls I have had no luck booting without safe boot.
I have stripped down all the kexts to the safe boot ones, yet still I can only safe boot. I've removed all the unnecessary graphics kexts (NV-, ATI-, GeForce-, etc.) and updated AppleACPIPlatform, and tried both combo and delta updates.
Relevant specs are that I have the 15z with an advanced format hard drive, and I've tried both GPT and MBR. I do get the "installation failed" error with kext cache error 71 when going higher than 10.8.2 but I've read that doesn't actually affect anything.
I have a feeling it's graphics-related because on normal boot it just hangs at the last line (no KP), but again I've deleted the unnecessary graphics kexts and only left the HD3000 ones. What would cause me to be able to update 10% of the time successfully but not the other 90? Thanks in advance!