I'm not entirely up to date on this subject, but when I initially did this project, it was on an iMac 2017. I recall that the iMac 2015 was also upgradable, but I'm uncertain about the iMac 2014, I assume you did the homework on this. Nonetheless, it's likely that the adapter and SSD should work. However, to err on the side of caution, ensure you have the latest firmware on the EVO Plus before installation, or consider opting for the SSD version without the "Plus". Hope this helps, have fun!