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
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) buy ram for imac
: Technically upgradeable, but requires removing the glued-on screen, which is risky for beginners. iMac 24-inch (M1/M3) The best way to buy RAM for an