I get the feeling I've made a moumental cockup somewhere, but here goes: I updated from 10.8.2 to 10.8.3 using Combo, making sure to move AppleGraphicsPowerManagement.kext out as suggested by immo here before rebooting. It did come with an interesting side effect, though, with a lovely [ PCI configuration begin ] hang and a stuck pinwheel. I've tried all the tips that google can provide, like graphicsenabler=no, npci=0x2000, and PCIRootUID=1 with no avail. Any ideas? I can't even boot into single-user mode as it's hanging way before then. Did I just forget to recopy some kexts or something?
Your guide worked a treat, thanks! Only problem I'm having now is with sleep, even with darkwake=0 the system sleeps fine but doesn't wake back up (just blankscreens). Any debug information I can peruse to work out the issue?
I seem to be having a similar issue to ruslan's getting Mountain Lion installation going (hanging in the same place just before the GUI should start), but for some strange reason my M1530 doesn't even seem to want to take downgrading the USB drive's S/L/E AppleACPIPlatform / IOPCIFamily as an answer. Immo, could you quickly run through how you got your ML installer working with your M1330? I'm using the basis of this (rather pooly worded) guide but there must be a better, cleaner way of doing it without using Uni and then fiddling with that.