How much RAM does the Apple iMac (21.5 in, Late 2012) support?

The iMac (21.5 in, Late 2012) supports up to 16GB of memory across 2 slot(s), up to 8GB per slot.

What type of memory does the iMac (21.5 in, Late 2012) use?

It uses DDR3 SODIMM memory modules.

Compatible drive types: SATA 2.5" SSD.

Guaranteed-compatible SSD and hard-drive upgrades for the Apple iMac (21.5 in, Late 2012), matched to its drive bays and slots.

Guaranteed-compatible SSD and hard-drive upgrades for the Apple iMac (21.5 in, Late 2012) — matched to its drive bays and slots.

This option is out of stock.

The drive bay size is inferred from the system's reported storage interface.
Compatibility is based on published specifications, not yet confirmed against a manufacturer tool.

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Guaranteed-compatible SSD and hard-drive upgrades for the Apple iMac (21.5 in, Late 2012), matched to its drive bays and slots.

Guaranteed-compatible SSD and hard-drive upgrades for the Apple iMac (21.5 in, Late 2012) — matched to its drive bays and slots.

This option is out of stock.

The drive bay size is inferred from the system's reported storage interface.
Compatibility is based on published specifications, not yet confirmed against a manufacturer tool.