For the MacBook Pros, the only models you can upgrade are older releases, starting with the very first 15-inch MacBook Pro from early 2008 up to the 13-inch and 15-inch MacBook Pro from mid-2012 ...

The RAM upgrade to bring the entry-level 13-inch MacBook Pro to 16GB from 8GB is just one of the many options available to customers upon checkout of the laptop on Apple’s online store.

The main difference is price, and that's about it. A comparison illustrates the point clearly. For a Summer 2012 model MacBook Pro, buying 8GB of RAM from Apple will set you back $200 as of July 2013.

Apple's high-end 14-inch and 16-inch MacBook Pro models from 2021 offer the M1 Pro chip with 16GB of RAM as standard, but you can upgrade to 32GB of RAM for $400. When choosing your ‌M1 Pro ...

For the MacBook Pros, the only models you can upgrade are older releases, starting with the very first 15-inch MacBook Pro from early 2008 up to the 13-inch and 15-inch MacBook Pro from mid-2012.