I triple-booted my Mac. Windows and Ubuntu can't boot. Only OSX.
When installing Ubuntu, I installed the bootloader on the same drive as Ubuntu. Ubuntu gave
an bootloader waring that I need a partition for bios reserved memory or whatever. When it was done only Mac OS X can boot. If I tried to boot Windows or Ubuntu it said:
Missing Opreating System. Removed Ubuntu partition and Windows said:
No bootable device, insert boot device and prees a key (nothing happens). I restored the Windows bootloader. I really need Ubuntu (going to try again) and I'm not willing for a virtual machine.