Alright I am trying to install a Mac OS snow leopard 10.6 build (10a432) the very first retail release on a fresh install. I believe I have a late 2009-2010 macbook pro with dual core 2 When I boot the computer and hold option to boot from usb, everything goes fine then I get a kernal panic telling me to restart my computer. I have tried to search but seem to find some slight answers. I believe the cause maybe from the snow leopard retail version I am using. Which is the very first retail release according to apple, which was released in August of 2009. The second retail disc came out in mid 2010, which is 10.6.3 I have read that this could be the problem causing the panic kernal... Do you think if I tried 10.6.3 it will work? Some say my computer will not work with anything lower than retail 10.6.3? please input I am trying to get this done tonight has been an awful two weeks to try to fix this.