Since the debut of the Apple iMac in 1998, OWC has offered Apple-compatible memory upgrades for any Apple iMac desktop. We recommend professional installation for these models to ensure you upgrade your iMac RAM safely. If you own a 21.5-inch iMac or an iMac Pro, the memory upgrade process is more advanced and involves removing and reinstalling the iMac screen to access the memory. After opening this door, you can easily access and pull out the original memory and replace it with any other Apple-compatible memory modules. In the back of each 27-inch iMac, there is a small memory bay door that houses the memory cage.
If you own a 27-inch iMac, upgrading the memory is simple and should only take about five minutes to complete.
