I installed Ubuntu 12.04 on my MB (aluminium late 2008). After installing Ubuntu I am unable to boot into OS X.
Sequence of events:
- Install reFit on OS X
- Install Ubuntu on a partitioned drive. I also installed grub.
Now when I boot my MB only the grub menu shows up. When I select OS X under grub I see a black screen for a while and the machine restarts (when selecting OS X 64 bit) or it hangs indefinitely(OS X 32 bit). Could you please help?
Link to output of boot info script. http://paste.ubuntu.com/1028017/
Best Answer
Try holding down the Option key (or Alt if you're using a PC keyboard) when you hear the chime early in the boot process. That should produce a boot menu that will enable you to boot to OS X. You can then re-install rEFIt (or switch to rEFInd, which is my updated fork of rEFIt, since rEFIt hasn't been updated in over two years). This should fix the problem.
If using Option or Alt doesn't give you a boot menu, try using a rEFIt or rEFInd boot CD. (Both projects have them, but the rEFIt CD is more likely to work on a Mac.) Again, you might need to hold down Option or Alt to see the CD as a boot option. Once booted, you can (re-)install rEFIt or rEFInd.
If neither of these approaches work, I see three others, but they all carry some risk:
Good luck!