Transforming 2008 MacBook into MacBook Pro 2020 ($1499.00) - SSD and RAM Upgrade - YouTube
Apple MacBook (12-inch, 2015) review: A minimalist MacBook that proves less can be more - CNET
MacBook Pro 15" Unibody Late 2008 and Early 2009 RAM Replacement - iFixit Repair Guide
20″ iMac (Early 2008) | Low End Mac
A-Tech 16GB Kit (2x8GB) RAM for Apple MacBook Pro (Mid 2012), iMac (Late 2012, Early/Late 2013, Late 2014, Mid 2015), Mac Mini (Late 2012) | DDR3 1600MHz PC3-12800 SODIMM 204-Pin Memory Upgrade at Amazon.com
Mac Pro (Early 2008) - Technical Specifications
Memory Upgrades for Apple iMac 2008 - Up to 6GB
How to Install macOS Ventura or Sonoma on Unsupported Macs, for Security Improvements - The Mac Security Blog