Chosen Solution
Hey, I know that you can put 2x16gb in it but can you also put 2x32gb in it? The 27 imac can be configured up to 64gb on apple’s site but you can put 128gb in it so I thought maybe its the same case with the 21.5. Lemme know
OWC appears to have it listed as being able to support 64GB !! OWC Memory Upgrades For 21.5" iMac with Retina 4K Display (2019) I would give them a call to verify they have in fact tested it and how fully. When you get into these larger memory configs many apps just can’t access all of it. You’ll need to talk with the app developer to see what they have tested. Buying this much RAM without a firm purpose I think is wasteful! While a single app may not leverage the full RAM space multiple apps as well as the work its self might benefit from the larger RAM space collectively. As an example many video editing apps leverage scratch space on your drive. If you setup a virtual RAM drive you could use it instead of a physical drive (so much faster!) But! Be careful here. If your system looses power so does your data held in RAM! So it has its down side!
Taken from our friends at EveryMac.com: Apple reports that this model has memory “built into the computer” and “it can only be upgraded by an Apple Authorized Service Provider if you choose to upgrade at a later date.” It is possible, but difficult, to upgrade the RAM yourself, too. They have a detailed write-up on how to upgrade your iMac’s RAM here: https://everymac.com/systems/apple/imac/… Here are the specs for this particular model, where it’s stated the max allowed RAM is 32 GB: https://everymac.com/systems/apple/imac/… I hope this helps!
