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OK, I had the same issue with the resolution only being 800x600. I followed the lead mentioned in this thread, and copied the snowGMA files into /S/L/E folder, then tried to perform the patching steps with the kextcache command. When I did so, it refused to incorporate the two .kext files, failing with the error: AppleIntelGMA950.kext is not authentic; omitting from mkext. And a similar error for the other one. How can I get it to accept them? I tried the -f option, which should force the issue, but it still failed with the same error. Is there something I'm missing, or is there a better way to fix the resolution problem? TIA, Trog