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Mac Specs > By Capability > Actual Maximum RAM > iMac Models

The actual maximum RAM of each iMac is listed below along with its compatible RAM type, default amount of RAM pre-installed, common identifiers suitable to identify a iMac in order to determine its RAM capacity, and more.

If you are not sure which iMac you have, and the Model Identifier and EMC Number below are not sufficient for identification, you also may look it up with other identifiers -- including its Serial Number -- with EveryMac.com's Ultimate Mac Lookup feature and the EveryMac app. If you need more help, refer to Mac Identification.

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Click the triangle to the left of a system to open "Quick Specs" -- the two most relevant identifiers for RAM capacity, full RAM details and links to buy compatible RAM from site sponsors -- and click on the name or image for complete specifications.

Asterisks indicate important details (such as a different "official" maximum RAM capacity listed within "Quick Specs" or other details on the complete specs page).

1 Apple Computer Actual Max RAM iMac G3/233 Original - Bondi (Rev. A & B) 384, 512 MB* iMac G3/266 (Fruit Colors) 512 MB* iMac G3/333 (Fruit Colors) 512 MB* iMac G3/350 (Slot Loading - Blueberry) 1 GB* iMac G3/400 DV (Slot Loading - Fruit) 1 GB* iMac G3/400 DV SE (Slot Loading) 1 GB* iMac G3/350 (Summer 2000 - Indigo) 1 GB iMac G3/400 DV (Summer 2000 - I/R) 1 GB iMac G3/450 DV+ (Summer 2000) 1 GB iMac G3/500 DV SE (Summer 2000) 1 GB iMac G3/400 (Early 2001 - Indigo) 1 GB iMac G3/500 (Early 2001 - Flower/Blue) 1 GB iMac G3/600 SE (Early 2001) 1 GB iMac G3/500 (Summer 2001 - I/S) 1 GB iMac G3/600 (Summer 2001) 1 GB iMac G3/700 SE (Summer 2001) 1 GB iMac G4/700 (Flat Panel) 1 GB iMac G4/800 (Flat Panel) 1 GB iMac G4/800 17-Inch (Flat Panel) 1 GB iMac G4/800 - X Only (Flat Panel) 1 GB iMac G4/1.0 17-Inch (Flat Panel) 2 GB* iMac G4/1.0 15-Inch "FP" (USB 2.0) 2 GB* iMac G4/1.25 17-Inch "FP" (USB 2.0) 2 GB* iMac G4/1.25 20-Inch "FP" (USB 2.0) 2 GB* iMac G5/1.6 17-Inch 2 GB iMac G5/1.8 17-Inch 2 GB iMac G5/1.8 20-Inch 2 GB iMac G5/1.8 17-Inch (ALS) 2 GB iMac G5/2.0 17-Inch (ALS) 2 GB iMac G5/2.0 20-Inch (ALS) 2 GB iMac G5/1.9 17-Inch (iSight) 2.5 GB iMac G5/2.1 20-Inch (iSight) 2.5 GB iMac "Core Duo" 1.83 17-Inch 2 GB iMac "Core Duo" 2.0 20-Inch 2 GB iMac "Core Duo" 1.83 17-Inch (IG) 2 GB iMac "Core 2 Duo" 1.83 17-Inch (IG) 2 GB iMac "Core 2 Duo" 2.0 17-Inch 4 GB* iMac "Core 2 Duo" 2.16 17-Inch 4 GB* iMac "Core 2 Duo" 2.16 20-Inch 4 GB* iMac "Core 2 Duo" 2.33 20-Inch 4 GB* iMac "Core 2 Duo" 2.16 24-Inch 4 GB* iMac "Core 2 Duo" 2.33 24-Inch 4 GB* iMac "Core 2 Duo" 2.0 20-Inch (Al) 6 GB* iMac "Core 2 Duo" 2.4 20-Inch (Al) 6 GB* iMac "Core 2 Duo" 2.4 24-Inch (Al) 6 GB* iMac "Core 2 Extreme" 2.8 24-Inch (Al) 6 GB* iMac "Core 2 Duo" 2.4 20-Inch (Early 2008) 6 GB* iMac "Core 2 Duo" 2.66 20-Inch (Early 2008) 6 GB* iMac "Core 2 Duo" 2.8 24-Inch (Early 2008) 6 GB* iMac "Core 2 Duo" 3.06 24-Inch (Early 2008) 6 GB* iMac "Core 2 Duo" 2.66 20-Inch (Early 2009) 8 GB iMac "Core 2 Duo" 2.66 24-Inch (Early 2009) 8 GB iMac "Core 2 Duo" 2.93 24-Inch (Early 2009) 8 GB iMac "Core 2 Duo" 3.06 24-Inch (Early 2009) 8 GB iMac "Core 2 Duo" 2.0 20-Inch (Mid-2009) 8 GB* iMac "Core 2 Duo" 2.26 20-Inch (Mid-2009) 8 GB iMac "Core 2 Duo" 3.06 21.5-Inch (Late 2009) 16 GB iMac "Core 2 Duo" 3.33 21.5-Inch (Late 2009) 16 GB iMac "Core 2 Duo" 3.06 27-Inch (Late 2009) 16 GB iMac "Core 2 Duo" 3.33 27-Inch (Late 2009) 16 GB iMac "Core i5" 2.66 27-Inch (Late 2009) 32 GB* iMac "Core i7" 2.8 27-Inch (Late 2009) 32 GB* iMac "Core i3" 3.06 21.5-Inch (Mid-2010) 16 GB iMac "Core i3" 3.2 21.5-Inch (Mid-2010) 16 GB iMac "Core i5" 3.6 21.5-Inch (Mid-2010) 16 GB iMac "Core i3" 3.2 27-Inch (Mid-2010) 16 GB iMac "Core i5" 2.8 27-Inch (Mid-2010) 32 GB* iMac "Core i5" 3.6 27-Inch (Mid-2010) 32 GB* iMac "Core i7" 2.93 27-Inch (Mid-2010) 32 GB* iMac "Core i5" 2.5 21.5-Inch (Mid-2011) 32 GB* iMac "Core i5" 2.7 21.5-Inch (Mid-2011) 32 GB* iMac "Core i7" 2.8 21.5-Inch (Mid-2011) 32 GB* iMac "Core i5" 2.7 27-Inch (Mid-2011) 32 GB* iMac "Core i5" 3.1 27-Inch (Mid-2011) 32 GB* iMac "Core i7" 3.4 27-Inch (Mid-2011) 32 GB* iMac "Core i3" 3.1 21.5-Inch (Late 2011) 16 GB* iMac "Core i5" 2.7 21.5-Inch (Late 2012) 16 GB* iMac "Core i5" 2.9 21.5-Inch (Late 2012) 16 GB* iMac "Core i7" 3.1 21.5-Inch (Late 2012) 16 GB* iMac "Core i5" 2.9 27-Inch (Late 2012) 32 GB iMac "Core i5" 3.2 27-Inch (Late 2012) 32 GB iMac "Core i7" 3.4 27-Inch (Late 2012) 32 GB iMac "Core i3" 3.3 21.5-Inch (Early 2013) 16 GB* iMac "Core i5" 2.7 21.5-Inch (Late 2013) 16 GB* iMac "Core i5" 2.9 21.5-Inch (Late 2013) 16 GB* iMac "Core i7" 3.1 21.5-Inch (Late 2013) 16 GB* iMac "Core i5" 3.2 27-Inch (Late 2013) 32 GB iMac "Core i5" 3.4 27-Inch (Late 2013) 32 GB iMac "Core i7" 3.5 27-Inch (Late 2013) 32 GB iMac "Core i5" 1.4 21.5-Inch (Mid-2014) 8 GB* iMac "Core i5" 3.5 27-Inch (5K, Late 2014) 32 GB iMac "Core i7" 4.0 27-Inch (5K, Late 2014) 32 GB iMac "Core i5" 3.3 27-Inch (5K, Mid-2015) 32 GB iMac "Core i5" 1.6 21.5-Inch (Late 2015) 16 GB* iMac "Core i5" 2.8 21.5-Inch (Late 2015) 16 GB* iMac "Core i5" 3.1 21.5-Inch (4K, Late 2015) 16 GB* iMac "Core i7" 3.3 21.5-Inch (4K, Late 2015) 16 GB* iMac "Core i5" 3.2 27-Inch (5K, Late 2015) 64 GB* iMac "Core i5" 3.3 27-Inch (5K, Late 2015) 64 GB* iMac "Core i7" 4.0 27-Inch (5K, Late 2015) 64 GB*

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