I bought two Apple 32 GB SO-DIMM modules at a great sale price thinking I could upgrade my memory on my 2019 iMac to 64 GB, but when I look at the capacity listed on the website, it says that maximum of 64 GB is with four 16 GB modules. Does that mean that 32 GB modules won't work? Thanks for any knowledgeable input!
iMac 27″, macOS 15.0
Just to compare, this is what Apple Tech Specs says for this model, and it depends on what CPU it is configured with:
Ref: iMac (Retina 5K, 27-inch, 2019) - Technical Specifications - Apple Support
However, the unofficial max RAM capacity is 128 GB, using 4 x 32 GB DDR4 2400 MHz SO-DIMMs. This configuration has been tested and confirmed to work by multiple third-party memory vendors like OWC (Other World Computing) and Crucial.
Regardless, the other thing to take into consideration is that Macs are very fussy about the RAM you use. Don't let price be your determining factor as, in a number of cases, these "cheap" modules turn out to be non-useable in your Mac.
Thank you so much for your reply – that’s very helpful! The RAM I have is actually Apple OEM modules, which I imagine were inexpensive because it’s for an older model. So I’ll try it. 😊
Can 32 GB SO-Dimm be installed in a 2019 27 inch Retina 5K iMac?
