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not sure if your asking what the update includes but here is whats on apples site regarding it


http://support.apple.com/kb/DL1450

you sig shows you have an i5, looks like the update is more for fixing issues on early 2011

I have an early 2011

"This update fixes several issues to improve the stability of MacBook Pro (early 2011) computers"

Thats what I was curious about..maybe I should have posted in the OSX section
 
Nope, but there was a Thunderbolt update afterwards with new drivers. Probably only changed Thunderbolt-related things, but all the same.
 
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