How can i choose to boot from the second SSD harddisk for a mid 2011 iMac? - Ask Different
iMac Intel 27" EMC 2309 and 2374 Hard Drive Replacement - iFixit Repair Guide
maxupgrades.com: Dual SSD Drives kit for iMac 27 inch 2012 Models with Blade SSD Module with Heatsink and Power and DATA Cables
How To Upgrade Your iMac with an SSD (2021 updated) | Upgradeable Australia
How-To: Now's the right time to swap your old iMac's hard drive for a fast new SSD - 9to5Mac
2011 imac 27" 32GB - final stage of 1TB + 2TB SSD upgrade (replaced HDD & optic drive). Also cleaned out the fans and case. Running 'SSD Fan Control' & 'Macs Fan
iMac 27 2012-2015 Hard Drive Replacement with SSD
iMac 2012 internal storage upgrade
Further Explained: Apple's iMac 2011 Model Hard Drive 'Restrictions'