Currently Being ModeratedOct 6, 2013 1:44 PM (in response to edcproduction)
On Mountain Lion you should be using 6.3 version utility.. the older 5.6 utility will not load.
If the 6.3 utility is corrupted in some way.. I am not sure.. you might need to reload the OS.
You can download the latest update from Apple and see if that works.