Memory on this page is for Apple iMac with Retina 5K display:
iMac 27″ 3.2GHz Intel Core i5
iMac 27″ 3.3GHz Intel Core i5
iMac 27″ 4.0GHz Intel Core i7
Works with Model Identifiers: iMac15,1 How to find Model ID?
Recommended: • iMac 5K comes with 4 memory slots supporting up to 16GB per slot • iMac 5K supports 64GB total memory • Install in pairs (2 modules at a time) for the best performance • iMac 5K comes with 8GB (4GB x 2) in its minimum stock configuration