I just got a new Mac Mini A1347 (Mac mini 2.3 GHz / dual-core Intel Core i5 / 2 GB RAM / 500 GB HD / Intel HD Graphics 3000) in my hands. I will test it with booting from a harddisk of a MBP 15" (early 2011, i7 quad 2.2GHz, Intel HD Graphics 3000, AMD Radeon HD 6750M 1024 MB) which was 10.6.7 and was updated to 10.6.8. As the graphic drivers match it should work like a charm. Test has been done using an external harddisk over Firewire 800 and as expected: It works flawlessly !!! Now to the hard facts: Systemversion : Mac OS X 10.6.8 (10K540) Kernel-version: Darwin 10.8.0 64-bit-Kernel : yes Let me know if you need more info or an image or whatever... ;-) Greetz