Thanks for reminding me how long ago the last MBP was released.
I just checked Mactracker and found that the OS X specs for these two MBPs...
MacBook Pro (15-inch, 2.53 GHz, Mid 2009) MacBookPros 13 122610DE-2C30-452A-97E5-125BD36CB590
and
MacBook Pro (15-inch, Mid 2009) MacBookPros 14 B75C32FA-8F01-4795-86A1-882BD1E92441
are: Original Mac OS: Mac OS X 10.5.7 (9J3050)
and: Later Mac OS: Mac OS X 10.6 (10A432)
slolerner may have some shopping to do?
OS! That doesn't mean Operating System. It means Oh S!#*
I have to start calling vendors, I guess.