How to reset my internal hard drive as start up drive?
Recently my Mountain Lion OS X got screwed for some unknown reason & it wouldn't boot and my Snow Leopard OS X Install DVD wouldn't finish the installation. I had access to ubuntu so I thought may be i could partition my Macintosh Hard Drive and install it in a partition and I made two partitions, one-Macintosh HD and the other- UBUNTU. And the Mount Point of my Macintosh HD changed from "/" to "/Volume/Macintosh HD". Now it wouldn't even show in 'Start Up Drive selection' and wouldn't let me install any Mac OS X saying "Mac OS X can't be installed on this system" even when I merged the partitions back. How do I change the mount point back from to "/" fro "/Volumes/Macintosh HD" and set it as my start up drive?
It would be very helpful if anyone can solve my problem. Thanks.
MacBook Pro, Mac OS X (10.6.8)