are the most user-friendly, featuring a dedicated door on the back for quick swaps. Quick Compatibility Guide iMac 27-inch (2019–2020) : Uses (PC4-21333). iMac 27-inch (2017) : Uses 2400MHz DDR4 SO-DIMM (PC4-19200). iMac 21.5-inch (2017–2019)
The best way to buy RAM for an iMac depends on your model, as Apple changed how (and if) memory can be upgraded over the years. Generally, the 27-inch Intel iMacs
💡 Buying from third parties like OWC or Crucial can save you hundreds compared to Apple’s factory prices.
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