I have the same issue: mid-2010 MacBook Pro 15 inch (MacBook Pro 6,2) and this article describes an issue I am having:
http://support.apple.com/kb/DL1098
http://support.apple.com/kb/TS3423
I checked my firmware version via system profiler:
- MacBookPro6,2
- Boot ROM Version MBP61.0057.B0C
- SMC Version 1.58f16
- OS Version Mac OS X 10.6.8 (10K549)
The list of firmware updates (http://support.apple.com/kb/HT1237) says I need:
- MBP61.0057.B0F (EFI 2.6)
This link (http://support.apple.com/kb/DL1492) in turn says it is for the right hardware (mid-2010 models), but only support OSX Lion.
The advice provided by Mr. Davis did not work in my case. Clearly, based on comparing System Profiler to published articles, there are both EFI and SMC updates available for my system newer than what I have, but Software Update fails to find any available updates.
Further, the articles referenced above specifically mention firmware updates may not be covered under Software Update tool.
So, that brings me back to square 1, I have an issue with hangs and the OS going off into the nether world for up to an hour at times, there are published solutions specific to my hardware for a very similar issue, but the links to the patches result in files which cannot be applied.
Any help will be greatly appreciated.
V/r
Brian