Dive into a larger memory pool with the 16GB DDR4 2400 MHz SODIMM Memory Upgrade Kit (2 x 8GB) from OWC. Featuring a total capacity of 16GB, comprised of two 8GB sticks, these modules conform to the 260-pin SODIMM layout standard. Compatible with DDR4 2400 MHz memory systems, these non-ECC modules are single-ranked, operate using 1.2V of power, and feature a CL17 CAS latency.
For 21.5" iMac (Late 2017) iMac18,1 and 21.5" iMac (Late 2017) iMac18,2. Installing memory in a 21.5" iMac (2017) requires tools to open the machine and adhesive to reseal it.