System Hangs on Boot

Question

Hi,
I have 2010 Macbook Pro I5 that we installed a 256GB SSD in a while ago.  The system was upgraded to Mountain Lion a week ago and all worked well.
Last night after the software update the machine rebooted and now hangs with a clear grey screen. 
When booting with 'Option Key' and going into the disk utilities function it seems as if the mount point for the root file system is altered from :/ to :/Volumes/Macintosh SSD.
How do I change the mount point. 
Thanks for your help

Answer 1

Not really, but did your macbook boot up normally after that?
try to open your system preference > start up disk > and select your mac os system folder.
try to repair permission by opening application / utilities / disk utility / repair permission.
insert your installer disk #1, boot up while pressing C, and once it boot up, upen utilities / disk utility / repair disk.
open your system preference > account > login item tab, and uncheck the application that you don't want to start automatically during start up.
Resetting PRAM and NVRAM
Shut down the computer.
Locate the following keys on the keyboard: Command, Option, P, and R. You will need to hold these keys down simultaneously in step 4.
Turn on the computer.
Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.
Hold the keys down until the computer restarts and you hear the startup sound for the second time.
Release the keys.
Hope that will speed up your start up process.
Good Luck.