Is it possible to downgrade Lion to Snow Leopard on a Mac that came with with SHIPPING Lion pre-installed? I have a SL install disk. This seems like a no-brainer question where the answer is "yes, of course, if you do a clean install of SL". But upon asking the Genius's at an Apple store, they say there is absolutely no way to downgrade from Lion to SL on any machine with Lion pre-installed. If true - which I just don't believe - this is horrible as I need a new laptop, but Lion is currently incompatible with some mission-critical apps I must use. Anyone try this? Advice? Thanks in advance.