I am trying to install Ubuntu 12.04 (Precise Pangolin) on a mid 2009 Macbook Pro. I am attempting to follow the instructions here: https://help.ubuntu.com/community/MactelSupportTeam/AppleIntelInstallation (1)
I am using the PC (Intel x86) desktop CD iso which I burned to a flash drive using the instructions here: https://help.ubuntu.com/community/How%20to%20install%20Ubuntu%20on%20MacBook%20using%20USB%20Stick (2)
I then proceeded to restart my mac, boot from the USB, start up Ubuntu, partitioned the drive using Gparted and install Ubuntu on my computer. I am confident the installation was complete. Afterwards, I was not able to restart the computer and was forced to do a hard reset.
The instructions say to restart your computer and fix a partitioning bug using rEFIt (which I have installed) As expected from (1), rEFIt gives me the error message "GPT partition of type 'Unknown' found, will not touch this disk" when I try to run the partitioning tool. I see that I need to install gptsync_0.13-10 but now when I try to boot from the USB, Ubuntu stalls for at least 20 mins at a blank screen with only a small white cursor in the upper left hand corner. I tried formatting my USB and re-burning the image to it, but have not been able to boot from the USB since.
Any suggestions or tips? Is my best bet just formatting everything and trying to reinstall again?