F12 Won't boot on Linux only MacBook

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http://forums.fedoraforum.org – F12 Live CD boots and runs fine. I installed to hard drive and now get: Grub loading. error: unknown filesystem grub rescue> _ (it is hung - I cannot type any commands here) I think I somehow have to use root and setup but don't remember and can't find specifics if I boot on CD, go to terminal, use su - and then enter grub and try: > find /boot/grub/stage1 - I get file not found I don't have my OSX disk with me and don't want OSX on the system. I also prefer not to use refit but have a refit rescue disk with me. thks for any help (HowTos)