4 Replies Latest reply: Mar 5, 2011 6:32 PM by Glenn Leblanc
macboy2000 Level 1 (5 points)
I recently purchased a 15" 2.16ghz Core Duo Macbook Pro. It came with the original 10.4.5 discs. The previous owner installed 10.6 on it using a retail disc, then upgraded to 10.6.6. I had planned on upgrading the original hard drive. However, I cannot get the laptop to boot from the original discs or my own retail 10.6 disc. I've tried a number of different approaches (booting from an external DVD, holding down "C", holding down "option", attempting to mount in on the desktop first, etc.). Either the machine hangs or it ejects the disc (when using the internal drive). Nothing seems to work. Both the internal drive and external drive have been tested and work fine. Is it possible that when upgrading to 10.6.6 a firmware upgrade was done that won't allow the machine to boot from a disc containing an earlier version? I don't know what else could be causing the issue. The laptop has not displayed any other issues. Thanks for any suggestions or explanations.

MBPRO, Mac OS X (10.6.6)