I just got off the phone with an Apple tech agent who told me that the latest (23 FEB 2012) EFI update with which my new 15" MPB ships will prevent me from performing a clean install of Snow Leopard (which I would prefer thanks to no Rosetta support for Lion). Is this true, or is it just a mandatory rap the techs give to prevent people from abandoning Lion? None of the software I currently use in my research will run without Rosetta support, and I don't particularly fancy having to run SL under a VM because it will be the environment I need 99% of the time, so I don't see the point of wasting resources on the native OS - but I will if I have no other option. Here are the relevant specs for my new machine: 2.5GHz Quad-core Intel Core i7 4GB 1333MHz DDR3 SDRAM - 2x2GB (installing 16GB 1333MHz DDR3 SDRAM - 2x8GB upon arrival) 256GB Solid State Drive 8x Double-Layer SuperDrive MBP 15" HR Antiglare WS Dspl I would appreciate advice from anyone who knows more about the subtleties of the latest firmware updates and how they translate between OS's. Thanks!