I am so glad I found this forum. So here is what happened: I was running OSX Lion, and wanted to install Linux as a dual boot. I used BootCamp to set up a partition, but chose to "install the os later". Then I installed REFIT (not sure why I just read online that I should). Next, I reboot my mbp and booted from a fedor live cd. After restarting my mbp shows "no bootable device" message. I read that this is due to MBR but I have no clue how to fix it. Here's what I've done so far: 1) Booted from the Ultimate Super Boot CD or whatever it is called - there I tried various partitioning tools, boot tools, but nothing works, it all freezes. I tried using Boot2Disk to boot from my HD but it froze as well. Kon-Boot doesn't do much either. 2) When I insert my SnowLeopard DVD it doesn't even recognize it...I still get the "no bootable device" message after holding option/cmd 3) I read I should try gptsync, but have no clue howto use it...do they make an iso image of it? Im basically clueless by now. Can someone please help. I've been going at it for 4 days now. Thanks.