iMac Intel 27 EMC 2309 and 2374 Teardown - iFixit
iMac Repair - iFixit
Mac Repair - iFixit
iMac Intel 21.5 EMC 2638 RAM Replacement - iFixit Repair Guide
iMac Intel 27 EMC 2429 Repair - iFixit
iFixit Adhesive Strips Compatible with iMac Intel 21.5 (2012-2019) : Electronics
Apple's repair policy is a good but small step for 'right to repair
iMac Intel 21.5 EMC 2389 Repair - iFixit
iFixit's 21.5-Inch iMac Teardown Finds A Few Pleasant Surprises - SlashGear
iMac Intel 21.5 EMC 2308 Glass Panel Replacement - iFixit Repair Guide
iMac Intel 27 EMC 2639 Adhesive Strips Replacement - iFixit Repair Guide
iFixit gives the new 24 M1 iMac a proper teardown treatment with a 2/10 repairability score: Digital Photography Review
iMac Intel 24 EMC 2267 Repair - iFixit