Chosen Solution
Can you upgrade a late 2012 27” iMac with a i9 CPU
Lets look at the two chips specs: Your systems CPU: Intel i7-3770S ProcessorThe new i9 CPU: Intel i9-7900X Processor Your system has a FCLGA1155 socket and the i9 requires a FCLGA2066 socket so you can’t fit this CPU into the system. Sorry