Retina MacBook Pros get faster CPUs, more RAM, and a few price cuts | Ars Technica
Apple Logic Board, 2.8GHz 16GB for MacBook Pro Retina 13" Mid 2014 A1502, (661-00610) - Apple Force
MacBook Air (13-inch, Early 2014) - Technical Specifications
Timetec Hynix IC 16GB KIT(2x8GB) Compatible for Apple DDR3 PC3-8500 1067MHz/1066MHz Upgrade for MacBook 13'' Mid 2010, MacBook Pro 13'' Mid 2010, iMac 27''Late 2009, Mac Mini Mid 2010(16GB KIT(2x8GB)) - Walmart.com
Certified Refurbished - Apple Macbook Pro 13" Retina display i5 2014 [2.6] [128GB] [8GB] MGX72LL/A - 30 Day Warranty - Walmart.com
Here's what to do if you can't install macOS Big Sur on your 13-inch MacBook Pro - 9to5Mac
A1502 Logic Board (2.4GHz Core i5, 4GB RAM) for Apple MacBook Pro Retina 13- inch A1502 (Late 2013 – Mid 2014) APN : 661-8145 PPN : 820-3476-A, 820-3536-A - WIT Computers