If You Absolutely Have to Buy an M1 Mac, Buy the Mac Mini | iFixit News
A-Tech 32GB Kit (4x8GB) RAM for Apple iMac (Late 2012, Late 2013, Late 2014, Mid 2015) | DDR3 1600MHz SODIMM PC3-12800 204-Pin SO-DIMM Max Memory Upgrade at Amazon.com
How to Remove or Install RAM into a Apple iMac (pre 2012) - YouTube
A-Tech 8GB (2 x 4GB) PC3-8500 DDR3 1066/1067 MHz RAM for MacBook, MacBook Pro, iMac, Mac Mini (Late 2008, Early/Mid/Late 2009, Mid 2010) | 204-Pin SODIMM Memory Kit at Amazon.com