There are very few differences, but a notable one is that the later model came with a 2.8GHz Intel Core 2 Duo processor, and the earlier model came with a 2.4GHz, 2.53GHz, or 2.66GHz Intel Core 2 Duo processor.

Two of these models were released this year, one was released in the middle of 2009 and the other in late 2009.

There are very few differences, but a notable one is that the later model came with either a 2.4GHz or 2.8 GHz dual-core Intel processor, and the earlier model had either a 2.3GHz or 2.7GHz dual-core Intel processor.

Two of these models were released this year, one was released in early 2011 and the other in late 2011.

Two of these models were released this year, one was released in early 2011 and the other in late 2011. There are very few differences, but a notable one is that the later model came with either a 2.2GHz or 2.4 GHz dual-core Intel processor, and the earlier model had either a 2.3GHz or 2.7GHz dual-core Intel processor.

Software Compatibility: Up to macOS High Sierra 10.13.6.

Two of these models were released this year, one was released in early 2011 and the other in late 2011. There are very few differences, but a notable one is that the later model came with a 2.4 GHz dual-core Intel processor, and the earlier model had a 2.2GHz dual-core Intel processor.

This model is also significantly thinner than its counterpart. This MacBook Pro includes a Retina display, which differentiates it from the other 2012 15-inch MacBook Pro. This model is also significantly thinner than the earlier model. This MacBook Pro includes a Retina display, which differentiates it from the early 2012 13-inch MacBook Pro.

Software Compatibility: Up to macOS Catalina 10.15.7.

The late 2013 release models (one 15-inch model and one 13-inch model) will be able to run the latest macOS, but the 13-inch and 15-inch models released in early 2013 will not. Note: there were two releases for MacBook Pros this year, each of which featured both a 13-inch model and a 15-inch model. MacBook Pro (13-inch, Two & Four Thunderbolt Ports)

Software Compatibility: This and all models since late 2013 can run the latest macOS.

This information is enough for most users, but for user guides and part numbers, you'll need to reference Apple's MacBook Pro page.

Software Compatibility: Up to OS X El Capitan 10.11.6.

Software Compatibility: Up to macOS High Sierra 10.13.6.

Software Compatibility: This and all models since 2015 can run the latest macOS.

Identify mac specs by serial number