In OS X versions later than 10.6.8 Snow Leopard, the "more info" button that had been
in the About this Mac details pane once the menu bar item is launched, from OS X 10.7
to present, would be known as System Information. That is a utility that also would be
available from GO in the main Finder window menu bar, if you choose Utilities, there.
Your computer model (both 13-inch and 15-inch) have 64-bit architecture according
to several sources including MacTracker database application. Identification numbers
can help to locate more detailed specs for specific models; re: MacBookPro11.1, etc
• How to identify MacBook Pro models - Apple Support
The hardware information and software information is in the System Information utility.
In older systems, the 'more info' button that was present, launched System Profiler.
MacbookPro models from 2007 forward (if not all after 2007) have 64-bit architecture.
The earliest models can only be upgraded past Snow Leopard 10.6.8 to Lion 10.7.5.
Site such as everymac.com, can be helpful for specifications; if your Mac is identified
correctly; since there are similar models with different build year model specifications.
For some information I have downloaded the free http://mactracker.ca application.
Good luck in this matter! 🙂
