Flashing Folder on Mac Pro 1,1 after trying to Bootcamp So I bought a Mac 1,1 and it runs great, until I tried to bootcamp it the other day with an old windows HDD i had. I downloaded windows, and tried to bootcamp it and now it will not boot the Mac HDD, but if I hold option on boot the HDD shows up and then i can boot into it. I am on OSX Lion.
You probably killed the boot sector for the OS X.

Use the CMD-R to restore the OSX.