How can i choose to boot from the second SSD harddisk for a mid 2011 iMac? - Ask Different
You won't be adding an aftermarket SSD to your new iMac | Ars Technica
maxupgrades.com: Single SSD Drives kit for iMac 27 inch 2012 Models with SATA Blade SSD Module / Heatsink/ Power Cable and DATA Cables for [SSD + HDD] with iMac Adhesive LCD Tape
Install SSD iMac 2011 - How-To DIY Guide Tutorial
New 2TB SSD in the iMac! Upgrade kit from OWC is awesome! : r/mac
Surprise! The iMac Pro has Upgradable RAM and SSD- The Mac Observer