APPLE IMAC | IMAC PRO - MEMORY UPGRADES
NEMIX RAM Apple iMac Memory Upgrades
The iMac has been Apple's desktop since 1998, and for most of that run the fastest, cheapest way to make one faster has been more memory. We stock tested SODIMM upgrades for every Intel iMac from the 2009 models through the Mid 2020 27" — plus ECC memory for the iMac Pro.
Know which iMac you have before you buy. Apple changed memory speed almost every model year, and the machines differ in how the memory is reached:
- 27" iMac (2012–2020) — a memory door on the back, behind the stand. Four slots, no tools, no disassembly. The easiest upgrade Apple ever shipped.
- 21.5" iMac — no door. The memory sits inside the machine, so this is a service job rather than a five-minute swap, and some configurations are fixed at the factory. Check your model before ordering.
- iMac Pro (2017, iMacPro1,1) — ECC Registered RDIMM, up to 512GB. Same server-grade memory class we build for enterprise, and a service-access job.
- M1, M3 and M4 iMac (2021 onward) — unified memory built into the chip. Not upgradeable, by anyone, ever. Whatever it shipped with is what it has.
NEMIX RAM can deliver any Configuration your Fleet Requires
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What we stock, by Generation
| iMac | Memory | Max |
|---|---|---|
| Mid 2019 / Mid 2020 (19,1 · 20,1 · 20,2) | DDR4 2666MHz PC4-21300 | 64GB |
| 2017 27" Retina 5K (18,3) | DDR4 2400MHz PC4-19200 | 64GB |
| 2017 21.5" 4K / non-Retina (18,1 · 18,2) | DDR4 2400MHz PC4-19200 | 64GB |
| iMac Pro 2017 (iMacPro1,1) | DDR4 2666MHz ECC RDIMM | 512GB |
| Late 2015 27" Retina 5K (17,1) | DDR3 1866MHz PC3-14900 | 64GB |
| 2012–2015 (13,2 · 14,2) | DDR3 1600MHz PC3-12800 | 32GB |
| 2010–2011 (11,2 · 11,3 · 12,1 · 12,2) | DDR3 1333MHz PC3-10600 | 32GB |
| 2009 27" & 21.5" (10,1 · 11,1) | DDR3 1066MHz PC3-8500 | 32GB |