I was able to fix this problem on a MacBook Pro 4,1 with a GeForce 8600M GT by following these instructions: https://ubuntuforums.org/showthread.php?t=2209602
In this case, installing the current version of Ubuntu (16.04.1) via USB with a GUID partition table was not a problem.
I was able to fix this problem on a MacBook Pro 4,1 with a GeForce 8600M GT by following these instructions: /ubuntuforums. org/showthread. php?t=2209602
https:/
In this case, installing the current version of Ubuntu (16.04.1) via USB with a GUID partition table was not a problem.