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Actual Maximum RAM of All iMac Models – Macs By Capability: EveryMac.com

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 topdeblogs.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).

Note that models with “None” for RAM Slots cannot have the RAM upgraded at all after the initial purchase of the computer.

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″ (Flat Panel) 1 GB iMac G4 800 – X Only (Flat Panel) 1 GB iMac G4 1.0 17″ (Flat Panel) 2 GB* iMac G4 1.0 15″ “FP” (USB 2.0) 2 GB* iMac G4 1.25 17″ “FP” (USB 2.0) 2 GB* iMac G4 1.25 20″ “FP” (USB 2.0) 2 GB* iMac G5 1.6 17″ 2 GB iMac G5 1.8 17″ 2 GB iMac G5 1.8 20″ 2 GB iMac G5 1.8 17″ (ALS) 2 GB iMac G5 2.0 17″ (ALS) 2 GB iMac G5 2.0 20″ (ALS) 2 GB iMac G5 1.9 17″ (iSight) 2.5 GB iMac G5 2.1 20″ (iSight) 2.5 GB iMac 17″ “Core Duo” 1.83 2 GB iMac 20″ “Core Duo” 2.0 2 GB iMac 17″ “Core Duo” 1.83 (IG) 2 GB iMac 17″ “Core 2 Duo” 1.83 (IG) 2 GB iMac 17″ “Core 2 Duo” 2.0 4 GB* iMac 17″ “Core 2 Duo” 2.16 4 GB* iMac 20″ “Core 2 Duo” 2.16 4 GB* iMac 20″ “Core 2 Duo” 2.33 4 GB* iMac 24″ “Core 2 Duo” 2.16 4 GB* iMac 24″ “Core 2 Duo” 2.33 4 GB* iMac 20″ “Core 2 Duo” 2.0 (Al) 6 GB* iMac 20″ “Core 2 Duo” 2.4 (Al) 6 GB* iMac 24″ “Core 2 Duo” 2.4 (Al) 6 GB* iMac 24″ “Core 2 Extreme” 2.8 (Al) 6 GB* iMac 20″ “Core 2 Duo” 2.4 (Early 2008) 6 GB* iMac 20″ “Core 2 Duo” 2.66 (Early 2008) 6 GB* iMac 24″ “Core 2 Duo” 2.8 (Early 2008) 6 GB* iMac 24″ “Core 2 Duo” 3.06 (Early 2008) 6 GB* iMac 20″ “Core 2 Duo” 2.66 (Early 2009) 8 GB iMac 24″ “Core 2 Duo” 2.66 (Early 2009) 8 GB iMac 24″ “Core 2 Duo” 2.93 (Early 2009) 8 GB iMac 24″ “Core 2 Duo” 3.06 (Early 2009) 8 GB iMac 20″ “Core 2 Duo” 2.0 (Mid-2009) 8 GB* iMac 20″ “Core 2 Duo” 2.26 (Mid-2009) 8 GB iMac 21.5″ “Core 2 Duo” 3.06 (Late 2009) 16 GB iMac 21.5″ “Core 2 Duo” 3.33 (Late 2009) 16 GB iMac 27″ “Core 2 Duo” 3.06 (Late 2009) 16 GB iMac 27″ “Core 2 Duo” 3.33 (Late 2009) 16 GB iMac 27″ “Core i5″ 2.66 (Late 2009) 32 GB* iMac 27” “Core i7″ 2.8 (Late 2009) 32 GB* iMac 21.5” “Core i3″ 3.06 (Mid-2010) 16 GB iMac 21.5” “Core i3″ 3.2 (Mid-2010) 16 GB iMac 21.5” “Core i5″ 3.6 (Mid-2010) 16 GB iMac 27” “Core i3″ 3.2 (Mid-2010) 16 GB iMac 27” “Core i5″ 2.8 (Mid-2010) 32 GB* iMac 27” “Core i5″ 3.6 (Mid-2010) 32 GB* iMac 27” “Core i7″ 2.93 (Mid-2010) 32 GB* iMac 21.5” “Core i5″ 2.5 (Mid-2011) 32 GB* iMac 21.5” “Core i5″ 2.7 (Mid-2011) 32 GB* iMac 21.5” “Core i7″ 2.8 (Mid-2011) 32 GB* iMac 27” “Core i5″ 2.7 (Mid-2011) 32 GB* iMac 27” “Core i5″ 3.1 (Mid-2011) 32 GB* iMac 27” “Core i7″ 3.4 (Mid-2011) 32 GB* iMac 21.5” “Core i3″ 3.1 (Late 2011) 16 GB* iMac 21.5” “Core i5″ 2.7 (Late 2012) 16 GB* iMac 21.5” “Core i5″ 2.9 (Late 2012) 16 GB* iMac 21.5” “Core i7″ 3.1 (Late 2012) 16 GB* iMac 27” “Core i5″ 2.9 (Late 2012) 32 GB iMac 27” “Core i5″ 3.2 (Late 2012) 32 GB iMac 27” “Core i7″ 3.4 (Late 2012) 32 GB iMac 21.5” “Core i3″ 3.3 (Early 2013) 16 GB* iMac 21.5” “Core i5″ 2.7 (Late 2013) 16 GB* iMac 21.5” “Core i5″ 2.9 (Late 2013) 16 GB* iMac 21.5” “Core i7″ 3.1 (Late 2013) 16 GB* iMac 27” “Core i5″ 3.2 (Late 2013) 32 GB iMac 27” “Core i5″ 3.4 (Late 2013) 32 GB iMac 27” “Core i7″ 3.5 (Late 2013) 32 GB iMac 21.5” “Core i5″ 1.4 (Mid-2014) 8 GB* iMac 27” “Core i5″ 3.5 (5K, Late 2014) 32 GB iMac 27” “Core i7″ 4.0 (5K, Late 2014) 32 GB iMac 27” “Core i5″ 3.3 (5K, Mid-2015) 32 GB iMac 21.5” “Core i5″ 1.6 (Late 2015) 16 GB* iMac 21.5” “Core i5″ 2.8 (Late 2015) 16 GB* iMac 21.5” “Core i5″ 3.1 (4K, Late 2015) 16 GB* iMac 21.5” “Core i7″ 3.3 (4K, Late 2015) 16 GB* iMac 27” “Core i5″ 3.2 (5K, Late 2015) 64 GB* iMac 27” “Core i5″ 3.3 (5K, Late 2015) 64 GB* iMac 27” “Core i7″ 4.0 (5K, Late 2015) 64 GB* iMac 21.5” “Core i5″ 2.3 (Mid-2017) 16 GB* iMac 21.5” “Core i5″ 3.0 (4K, Mid-2017) 32 GB* iMac 21.5” “Core i5″ 3.4 (4K, Mid-2017) 32 GB* iMac 21.5” “Core i7″ 3.6 (4K, Mid-2017) 32 GB* iMac 27” “Core i5″ 3.4 (5K, Mid-2017) 64 GB* iMac 27” “Core i5″ 3.5 (5K, Mid-2017) 64 GB* iMac 27” “Core i5″ 3.8 (5K, Mid-2017) 64 GB* iMac 27” “Core i7″ 4.2 (5K, Mid-2017) 64 GB* iMac 21.5” “Core i3″ 3.6 (4K, 2019) 32 GB* iMac 21.5” “Core i5″ 3.0 (4K, 2019) 32 GB* iMac 21.5” “Core i7″ 3.2 (4K, 2019) 32 GB* iMac 27” “Core i5″ 3.0 (5K, 2019) 128 GB* iMac 27” “Core i5″ 3.1 (5K, 2019) 128 GB* iMac 27” “Core i5″ 3.7 (5K, 2019) 128 GB* iMac 27” “Core i9″ 3.6 (5K, 2019) 128 GB* iMac 27” “Core i5″ 3.1 (5K, 2020) 128 GB iMac 27” “Core i5″ 3.3 (5K, 2020) 128 GB iMac 27” “Core i7″ 3.8 (5K, 2020) 128 GB iMac 27” “Core i9″ 3.6 (5K, 2020) 128 GB iMac 27” “Core i7″ 3.8 (5K, 2020; 5700/XT) 128 GB iMac 27” “Core i9” 3.6 (5K, 2020; 5700/XT) 128 GB iMac Pro “8-Core” 3.2 27″ (5K, Late 2017) 512 GB* iMac Pro “10-Core” 3.0 27″ (5K, Late 2017) 512 GB* iMac Pro “14-Core” 2.5 27″ (5K, Late 2017) 512 GB* iMac Pro “18-Core” 2.3 27″ (5K, Late 2017) 512 GB*

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