Late 2009 - iMac10,1
compatible upgrades for MB950LL/A*, MB952LL/A, BTO/CTO 21,5inch and 27inch
Standard RAM: 4 GB
Maximum RAM: 16 GB
Details: By default, 4 GB of RAM was installed as two 2 GB SO-DIMM modules. Two slots free.
RAM Slots: 4
Choose Ram memory or storage option from left hand side panel