Memory (PC4-21300, DDR4 2666MHz)





  • Replace some bad RAM or give yourself an upgrade with our matching memory module pairs.
  • Both the model A2116 iMac 21.5" and the model A1993 Mac mini have two SO-DIMM memory slots and support a maximum of 64GB memory.
  • If you have an iMac 21.5" A2116 (2019), be aware that this memory is only compatible with the Core i5 and i7 processors, while the Core i3 processor should be used with PC4-19200 memory.

What's Included

  • Depends on option selected

Identifying Numbers

  • APN : 661-10239, 661-10240, 661-10241

    Apple Part Numbers

    • Created for internal Apple use.
    • Never visible on the item.
  • PPN : PC4-2666V

    Printed Part Numbers

    • Created by manufacturers during production.
    • Always visible on the item.

Tech Specs

  • Capacity: 8GB (2x4GB), 16GB (2x8GB), 32GB (2x16GB), or 64GB (2x32GB)
  • Pin Count: 260-pin
  • Speed: 2666MHz
  • Voltage: 1.2V



Find your device to verify compatibility.

Not Compatible




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iMac 21.5" A2116
  • iMac19,2 Retina 4K 2019: MRT42LL/A (3.0 GHz Core i5)
  • iMac19,2 Retina 4K 2019: BTO (3.2 GHz Core i7)
Mac mini A1993
  • Macmini8,1 2018: MRTR2LL/A (3.6 GHz Core i3)
  • Macmini8,1 2018: MRTT2LL/A (3.0 GHz Core i5)
  • Macmini8,1 2018: BTO/CTO (3.2 GHz Core i7)