Chosen Solution

Dear forum friends, I am willing to buy an upgrade kit for my iMac. I am thinking of inserting the 500 Gb SSD. My question is: do I need to take the original 3-Tb HD out, or can I run the iMac with both the new SSD and old 3-Tb HD? Thanks (iMac Intel 27" (Late 2012-2019) SSD Upgrade Kit)

STOP!! Atul - Sorry guy the IFIXIT drive is a 2.5” SATA drive it is NOT what you want if you also want to hold onto your current HDD. You need a blade SSD and you need review this: The Ultimate Guide to Apple’s Proprietary SSDs

No It Is Not Possible Because The Newer Models Drop Support For Dual Drives.