I'm trying to match my model # with those listed in the chart. My model # is A1181, and I purchased it new in August of 2006, but I can't seem to match it. Is it a 2006 or late 2006 model? It has a 2 Ghz Intel Core Duo processor and a 60 Gig super driv

Welcome to Apple Support Communities

If you're certain of the purchase date, you most likely have an Early 2006 MacBook. The late 2006 MacBook was introduced in November 2006.

This table from EveryMac.com will help you with model specifications

http://www.everymac.com/systems/apple/macbook/specs/macbook_2.0_white.html

This Wikipedia table gives more specs to compare the many MacBook models, though it does not translate the A1181 designation:

http://en.wikipedia.org/wiki/MacBook

You cannot upgrade it to either OS X 10.7 'Lion' or OS X 10.8 'Mountain Lion', if that is your question.

Microprocessors are not upgradeable.

The newest OS supporting the Core Duo processor installed in your MacBook is OS X 10.6, 'Snow Leopard', and it is still available to order from Apple on CD. It has never been available as a download.

You need at least 1.0GB installed RAM to run Snow Leopard, and 2GB RAM makes performance better.

Full Snow Leopard specs and requirements are found here:

http://support.apple.com/kb/SP575

Message was edited by: kostby

A1181 is simply the designation for any of the 17 different White or Black MacBooks with the removable battery that were made between 2006 and 2009

Core Duo Macbooks were mid 2006 (I've had the first gen Macbook), the late 2006 models had Core 2 Duo chips.