Late 2011 - iMac12,1
compatible upgrades for : MC978LL/A
Standard RAM: 2 GB
Maximum RAM: 16 GB*
Details: By default, 2 GB of RAM is installed as one 2 GB SO-DIMM module.
RAM Slots: 4
*This model officially supports 8 GB of RAM, but third-parties have discovered that it actually supports 16 GB of RAM.