27″ iMac with Retina 5K Display (2017)

Up to 64GB of memory

21.5″ iMac with Retina 4K & Non-Retina Display (2017)

NEW! Up to 64GB of memory

27″ iMac with Retina 5K Display (Late 2015)

Up to 64GB of memory

27″ iMac with Retina 5K Display (Late 2014 & Mid 2015)

Up to 32GB of memory

27″ iMac (2012 – Mid 2015)

Up to 32GB of memory

21.5″ iMac (2012 – Late 2013)

Up to 16GB of memory

iMac (Mid & Late 2011)

Up to 32GB of memory

iMac (2010)

Up to 32GB of memory

iMac (Late 2009)

Up to 32GB of memory

iMac (Early & Mid 2009)

Up to 8GB of memory

iMac (2008)

Up to 6GB of memory

iMac (2007)

Up to 6GB of memory

iMac (2006)

Up to 4GB of memory

iMac G5

Up to 2.5GB or memory

iMac G4

iMac

Up to 1GB of memory