How many models of iMacs are there?

Lots! The original ‘Gumdrop’ plastic cased iMac was released in 1998, and came in a variety of funky colours. If you watch any US film or TV series from this period, you’re sure to see the unmistakable form of an early iMac showing up somewhere. With it’s innovative design, usability and clever product placement, the iMac is credited with turning the fortunes of Apple around. In this article, we’ll concentrate on ‘the modern era’, 2009 onwards. 12 years is centuries in computer history.

How do I find my iMac model?

Assuming that your iMac is still functioning, the easiest place to start is here:

• Navigate to the Apple icon on the top left hand corner of your screen
• The ‘Overview’ panel will appear. Click on ‘System Report’, take a screenshot and consult the list below
• On an older OS that doesn’t display an overview, click on ‘More Info’ This will open a panel that displays the hardware overview for your iMac. Take a screen shot, and consult the list below

If your iMac doesn’t start up, the original packaging may also show an Apple part number, such as MMQA2xx/A (“xx” is a variable that differs by country or region). You can match the Apple part number to one on the list below to find your model.

List of iMac models

iMac models are organised below by the year when they were introduced, starting with the most recent. Models from 2012 or later can run the latest version of macOS. For models from before 2012, the latest compatible operating system is listed.

iMac (Retina 5K, 27-inch, 2020)

• Model Identifier: iMac20,1, iMac20,2
• Part Numbers: MXWT2xx/A, MXWU2xx/A, MXWV2xx/A
• Processor options: 3.1GHz, 3.3Ghz, 3.8GHz
• RAM options: 8GB (two 4GB) of 2666MHz DDR4 memory; four SO-DIMM slots, user accessible. Configurable to 16GB, 32GB, 64GB, or 128GB
• Storage: 3.1GHz 256GB SSD/ 3.3GHz 512GB SSD (configurable to 1TB or 2TB SSD)/ 3.8GHz 512GB SSD (configurable to 1TB, 2TB, 4TB, or 8TB SSD)
• Graphics: 3.1GHz & 3.3GHz Radeon Pro 5300 with 4GB of GDDR6 memory/ 3.8GHz Radeon Pro 5500 XT with 8GB of GDDR6 memory (configurable to Radeon Pro 5700 with 8GB of GDDR6 memory, Radeon Pro 5700 XT with 16GB of GDDR6 memory)
  

iMac (Retina 5K, 27-inch, 2019)

• Model Label: iMac19,1
• Part Numbers:MRQYxx/A, MRR0xx/A, MRR1xx/A
• Processor options: 3.0GHz 6‑core Intel Core i5 (Turbo Boost up to 4.1GHz)/ 3.1GHz 6‑core Intel Core i5 (Turbo Boost up to 4.3GHz). Configurable to 3.6GHz 8-core Intel Core i9 (Turbo Boost up to 5.0GHz)/ 3.7GHz 6‑core Intel Core i5 (Turbo Boost up to 4.6GHz). Configurable to 3.6GHz 8-core Intel Core i9 (Turbo Boost up to 5.0GHz)
• RAM options: 3.0GHz 8GB (two 4GB) of 2666MHz DDR4 memory; four SO-DIMM slots, user accessible (Configurable to 16GB or 32GB) 3.1GHz & 3.7GHz 8GB (two 4GB) of 2666MHz DDR4 memory; four SO-DIMM slots, user accessible (Configurable to 16GB, 32GB, or 64GB)
• Storage: 3.0GHz & 3.1GHz 1TB Fusion Drive (Configurable to 2TB Fusion Drive or 256GB, 512GB, or 1TB SSD)/ 3.7GHz 2TB Fusion Drive (Configurable to 3TB Fusion Drive or 512GB, 1TB, or 2TB SSD)
• Graphics: 3.0GHz & 3.1GHz Radeon Pro 570X with 4GB of GDDR5 memory/ 3.7GHz Radeon Pro 580X with 8GB of GDDR5 memory (configurable to Radeon Pro Vega 48 with 8GB of HBM2 memory)

iMac (Retina 4K, 21.5-inch, 2019)

• Model Label: iMac19,2
• Part Numbers:MRT3xx/A, MRT4xx/A, MHK23xx/A
• Processor options: 3.6GHz quad‑core Intel Core i3 (configurable to 3.2GHz 6-core Intel Core i7, Turbo Boost up to 4.6GHz)/ 3.0GHz 6-core Intel Core i5 (Turbo Boost up to 4.1GHz). Configurable to 3.2GHz 6-core Intel Core i7, Turbo Boost up to 4.6GHz
• RAM options: 8GB of 2400MHz DDR4 memory (configurable to 16GB or 32GB)
• Storage: 256GB SSD (configurable to 1TB Fusion Drive, 512GB SSD, or 1TB SSD)
• Graphics: 3.6GHz Radeon Pro 555X with 2GB of GDDR5 memory/ 3.0GHz Radeon Pro 560X with 4GB of GDDR5 memory (configurable to Radeon Pro Vega 20 with 4GB of HBM2 memory)

iMac Pro (2017)

• Model Label: iMacPro1,1
• Part Numbers:MQ2Y2xx/A, MHLV3xx/A
• Processor options: 8-Core 3.2GHz Intel Xeon W Turbo Boost up to 4.2GHz 19MB cache/ 10-Core 3.0GHz Intel Xeon W Turbo Boost up to 4.5GHz 23.75MB cache. Configurable to 14-Core 2.5GHz Intel Xeon W Turbo Boost up to 4.3GHz 33.25MB cache/ 18-Core 2.3GHz Intel Xeon W Turbo Boost up to 4.3GHz 42.75MB cache
• RAM options: 32GB of 2666MHz DDR4 ECC memory Quad-channel memory controller. Configurable to 64GB of 2666MHz DDR4 ECC memory/ 128GB of 2666MHz DDR4 ECC memory/ 256GB of 2666MHz DDR4 ECC memory
• Storage: 1TB SSD. Configurable to 2TB or 4TB SSD
• Graphics: Vega 56 Radeon Pro graphics processor with 8GB of HBM2 memory. Configurable to Vega 64 Radeon Pro graphics processor with 16GB of HBM2 memory/ Vega 64X Radeon Pro Vega 64X graphics processor with 16GB of HBM2 memory

iMac (Retina 5K, 27-inch, 2017)

• Model Label: iMac18,3
• Part Numbers:MNE92xx/A, MNEA2xx/A, MNED2xx/A
• Processor options: 3.4GHz quad‑core Intel Core i5 (Turbo Boost up to 3.8GHz)/ 3.5GHz quad‑core Intel Core i5 (Turbo Boost up to 4.1GHz). Configurable to 4.2GHz quad-core Intel Core i7 (Turbo Boost up to 4.5GHz)/ 3.8GHz quad‑core Intel Core i5 (Turbo Boost up to 4.2GHz). Configurable to 4.2GHz quad-core Intel Core i7 (Turbo Boost up to 4.5GHz)
• RAM options: 3.4GHz 8GB (two 4GB) of 2400MHz DDR4 memory; four SO-DIMM slots, user accessible. Configurable to 16GB or 32GB/ 3.5GHz & 3.8GHz 8GB (two 4GB) of 2400MHz DDR4 memory; four SO-DIMM slots, user accessible. Configurable to 16GB, 32GB, or 64GB
• Storage: 3.4GHz 1TB Fusion Drive. Configurable to 2TB Fusion Drive or 256GB, 512GB, or 1TB SSD/ 3.5GHz 1TB Fusion Drive. Configurable to 2TB or 3TB Fusion Drive or 256GB, 512GB, or 1TB SSD/ 3.8GHz 2TB Fusion Drive. Configurable to 3TB Fusion Drive or 512GB, 1TB, or 2TB SSD
• Graphics: 3.4GHz Radeon Pro 570 with 4GB of VRAM/ 3.5GHz
  Radeon Pro 575 with 4GB of VRAM/ 3.8GHz Radeon Pro 580 with 8GB of VRAM

iMac (Retina 4K, 21.5-inch, 2017)

• Model Label: iMac18,2
• Part Numbers:MNDY2xx/A, MNE02xx/A
• Processor options: 3.0GHz quad‑core Intel Core i5 (Turbo Boost up to 3.5GHz). Configurable to 3.6GHz quad-core Intel Core i7 (Turbo Boost up to 4.2GHz)/ 3.4GHz quad-core Intel Core i5 (Turbo Boost up to 3.8GHz). Configurable to 3.6GHz quad-core Intel Core i7 (Turbo Boost up to 4.2GHz)
• RAM options: 3.0GHz 8GB of 2400MHz DDR4 memory. Configurable to 16GB/ 3.4GHz 8GB of 2400MHz DDR4 memory. Configurable to 16GB or 32GB
• Storage: 3.0GHz 1TB (5400-rpm) hard drive. Configurable to 1TB Fusion Drive or 256GB or 512GB SSD/ 3.4GHz 1TB Fusion Drive. Configurable to 256GB, 512GB, or 1TB SSD
• Graphics: 3.0GHz Radeon Pro 555 with 2GB of VRAM/ 3.4GHz Radeon Pro 560 with 4GB of VRAM

iMac (21.5-inch, 2017)

• Model Label: iMac18,1
• Part Numbers: MMQA2xx/A, MHK03xx/A
• Processor options: 2.3GHz dual‑core Intel Core i5 (Turbo Boost up to 3.6GHz)
• RAM options: 2.3GHz 8GB of 2133MHz DDR4 memory. Configurable to 16GB
• Storage: 1TB (5400-rpm) hard drive. Configurable to 1TB Fusion Drive or 256GB SSD
• Graphics: Intel Iris Plus Graphics 640

iMac (Retina 5K, 27-inch, Late 2015)

• Model Label: iMac17,1
• Part Numbers:MK462xx/A, MK472xx/A, MK482xx/A
• Processor options: 3.2GHz quad‑core Intel Core i5 (Turbo Boost up to 3.6GHz)/ 3.2GHz quad‑core Intel Core i5 (Turbo Boost up to 3.6GHz). Configurable to 4.0GHz quad-core Intel Core i7 (Turbo Boost up to 4.2GHz)/ 3.3GHz quad‑core Intel Core i5 (Turbo Boost up to 3.9GHz). Configurable to 4.0GHz quad-core Intel Core i7 (Turbo Boost up to 4.2GHz)
• RAM options: 8GB (two 4GB) of 1867MHz DDR3 memory; four SO-DIMM slots, user accessible. Configurable to 16GB or 32GB
• Storage: 3.2GHz 1TB (7200-rpm) hard drive. Configurable up to 3TB Fusion Drive or 256GB or 512GB of flash storage (SSD)/ 3.2GHz 1TB Fusion Drive. Configurable up to 3TB Fusion Drive or 256GB, 512GB, or 1TB of flash storage (SSD)/ 3.3GHz 2TB Fusion Drive. Configurable up to 3TB Fusion Drive or 256GB, 512GB, or 1TB of flash storage (SSD)
• Graphics: 3.2GHz AMD Radeon R9 M380 graphics processor with 2GB of GDDR5 memory/ 3.2GHz AMD Radeon R9 M390 graphics processor with 2GB of GDDR5 memory/ 3.3GHz AMD Radeon R9 M395 graphics processor with 2GB of GDDR5 memory. Configurable to AMD Radeon R9 M395X with 4GB of GDDR5 memory

iMac (Retina 4K, 21.5-inch, Late 2015)

• Model Label: iMac16,2
• Part Numbers:MK452xx/A
• Processor options: 3.1GHz quad-core Intel Core i5 (Turbo Boost up to 3.6GHz). Configurable to 3.3GHz quad-core Intel Core i7 (Turbo Boost up to 3.8GHz)
• RAM options: 8GB of 1867MHz LPDDR3 onboard memory. Configurable to 16GB
• Storage: 1TB (5400-rpm) hard drive. Configurable up to 2TB Fusion Drive or 512GB of flash storage (SSD)
• Graphics: Intel Iris Pro Graphics 6200

iMac (21.5-inch, Late 2015)

• Model Label: iMac16,1
• Part Numbers:MK142xx/A, MK442xx/A
• Processor options: 1.6GHz dual‑core Intel Core i5 (Turbo Boost up to 2.7GHz)/ 2.8GHz quad‑core Intel Core i5 (Turbo Boost up to 3.3GHz)
• RAM options: 8GB of 1867MHz LPDDR3 onboard memory. Configurable to 16GB
• Storage: 1.6GHz 1TB (5400-rpm) hard drive. Configurable up to 1TB Fusion Drive or 256GB of flash storage (SSD)/ 2.8GHz 1TB (5400-rpm) hard drive. Configurable up to 2TB Fusion Drive or 256GB of flash storage (SSD)
• Graphics: 1.6GHz Intel HD Graphics 6000/ 2.8GHz Intel Iris Pro Graphics 6200

iMac (Retina 5K, 27-inch, Mid 2015)

• Model Label: iMac15,1
• Part Numbers:MF885xx/A
• Processor options: 3.3GHz quad-core Intel Core i5 processor (Turbo Boost up to 3.7GHz)
• RAM options: 8GB (two 4GB) of 1600MHz DDR3 memory (four SO-DIMM slots, user accessible). Configurable to 16GB or 32GB
• Storage: 1TB (7200-rpm) hard drive. Configurable to 3TB hard drive, 1TB or 3TB Fusion Drive, or 256GB, 512GB, or 1TB of flash storage (SSD)
• Graphics: AMD Radeon R9 M290 graphics processor with 2GB of GDDR5 memory

iMac (Retina 5K, 27-inch, Late 2014)

• Model Label: iMac15,1
• Part Numbers:MF886xx/A
• Processor options: 3.5GHz quad-core Intel Core i5 processor (Turbo Boost up to 3.9GHz). Configurable to 4.0GHz quad-core Intel Core i7 (Turbo Boost up to 4.4GHz)
• RAM options: 8GB (two 4GB) of 1600MHz DDR3 memory; four SO-DIMM slots, user accessible. Configurable to 16GB or 32GB
• Storage: 1TB Fusion Drive. Configurable to 3TB Fusion Drive or 256GB, 512GB, or 1TB of flash storage (SSD)
• Graphics: AMD Radeon R9 M290X graphics processor with 2GB of GDDR5 memory. Configurable to AMD Radeon R9 M295X with 4GB of GDDR5 memory

iMac (21.5-inch, Mid 2014)

• Model Label: iMac14,4
• Part Numbers:MF883xx/A, MG022xx/A
• Processor options: 1.4GHz dual-core Intel Core i5 processor (Turbo Boost up to 2.7GHz) with 3MB shared L3 cache
• RAM options: 8GB of 1600MHz LPDDR3 onboard memory
• Storage: 500GB (5400-rpm) hard drive. Configurable to 1TB hard drive, 1TB Fusion Drive, or 256GB of PCIe-based flash storage
• Graphics: Intel HD Graphics 5000

iMac (27-inch, Late 2013)

• Model Label: iMac14,2
• Part Numbers:ME086xx/A, ME088xx/A
• Processor options: 3.2GHz quad-core Intel Core i5 processor (Turbo Boost up to 3.6GHz) with 6MB L3 cache/ 3.4GHz quad-core Intel Core i5 processor (Turbo Boost up to 3.8GHz) with 6MB L3 cache. Configurable to 3.5GHz quad-core Intel Core i7 (Turbo Boost up to 3.9GHz)
• RAM options: 8GB (two 4GB) of 1600MHz DDR3 memory; four user-accessible SO-DIMM slots. Configurable to 16GB or 32GB
• Storage: 1TB (7200-rpm) hard drive. Configurable to 3TB hard drive, 1TB or 3TB Fusion Drive, or 256GB, 512GB, or 1TB of flash storage
• Graphics: 3.2GHz NVIDIA GeForce GT 755M graphics processor with 1GB of GDDR5 memory/ 3.4GHz NVIDIA GeForce GTX 775M graphics processor with 2GB of GDDR5 memory. Configurable to NVIDIA GeForce GTX 780M with 4GB of GDDR5 memory

iMac (21.5-inch, Late 2013)

• Model Label: iMac14,1
• Part Numbers:ME086xx/A, ME087xx/A
• Processor options: 2.7GHz quad-core Intel Core i5 processor (Turbo Boost up to 3.2GHz) with 4MB L3 cache/ 2.9GHz quad-core Intel Core i5 processor (Turbo Boost up to 3.6GHz) with 6MB L3 cache. Configurable to 3.1GHz quad-core Intel Core i7 (Turbo Boost up to 3.9GHz)
• RAM options: 8GB (two 4GB) of 1600MHz DDR3 memory. Configurable to 16GB
• Storage: 1TB (5400-rpm) hard drive. Configurable to 1TB Fusion Drive or 256GB or 512GB of flash storage
• Graphics: 2.7GHz Intel Iris Pro graphics/ 2.9GHz NVIDIA GeForce GT 750M graphics processor with 1GB of GDDR5 memory

iMac (27-inch, Late 2012)

• Model Label: iMac13,2
• Part Numbers:MD095xx/A, MD096xx/A
• Processor options: 2.9GHz quad-core Intel Core i5 processor (Turbo Boost up to 3.6GHz) with 6MB L3 cache/ 3.2GHz quad-core Intel Core i5 processor (Turbo Boost up to 3.6GHz) with 6MB L3 cache. Configurable to 3.4GHz quad-core Intel Core i7 (Turbo Boost up to 3.9GHz)
• RAM options: 8GB (two 4GB) of 1600MHz DDR3 memory; four user-accessible SO-DIMM slots. Configurable to 16GB or 32GB
• Storage: 1TB (7200-rpm) hard drive. Configurable to 3TB hard drive, 1TB or 3TB Fusion Drive, or 768GB of flash storage
• Graphics: 2.9GHz NVIDIA GeForce GTX 660M graphics processor with 512MB of GDDR5 memory/ 3.2GHz NVIDIA GeForce GTX 675MX graphics processor with 1GB of GDDR5 memory. Configurable to NVIDIA GeForce GTX 680MX with 2GB of GDDR5 memory

iMac (21.5-inch, Late 2012)

• Model Label: iMac13,1
• Part Numbers:MD093xx/A, MD094xx/A
• Processor options: 2.7GHz quad-core Intel Core i5 processor (Turbo Boost up to 3.2GHz) with 6MB L3 cache/ 2.9GHz quad-core Intel Core i5 processor (Turbo Boost up to 3.6GHz) with 6MB L3 cache. Configurable to 3.1GHz quad-core Intel Core i7 (Turbo Boost up to 3.9GHz)
• RAM options: 8GB (two 4GB) of 1600MHz DDR3 memory. Configurable to 16GB
• Storage: 2.7GHz 1TB (5400-rpm) hard drive/ 2.9GHz 1TB (5400-rpm) hard drive. Configurable to 1TB Fusion Drive
• Graphics: 2.7GHz NVIDIA GeForce GT 640M graphics processor with 512MB of GDDR5 memory/ 2.9GHz NVIDIA GeForce GT 650M graphics processor with 512MB of GDDR5 memory

iMac (27-inch, Mid 2011)

• Model Label: iMac12,2
• Part Numbers:MC813xx/A, MC814xx/A
• Processor options: 2.7GHz quad-core Intel Core i5 with 6MB on-chip shared L3 cache/ 3.1GHz quad-core Intel Core i5 with 6MB on-chip shared L3 cache. Configurable to 3.4GHz quad-core Intel Core i7
• RAM options: 4GB (two 2GB) of 1333MHz DDR3 memory. Configurable to 16GB
• Storage: 2.7 GHz 1TB (7200 rpm) hard drive. Configurable to 2TB hard drive or 256GB SSD/ 3.1 GHz 1TB (7200 rpm) hard drive. Configurable to 2TB hard drive or 256GB SSD
• Graphics: 2.7 GHz AMD Radeon HD 6770M graphics processor with 512MB of GDDR5 memory/ 3.1 GHz AMD Radeon HD 6970M graphics processor with 1GB of GDDR5 memory. Configurable to AMD Radeon HD 6970M with 2GB GDDR5

iMac (21.5-inch, Mid 2011)

• Model Label: iMac12,1
• Part Numbers:MC309xx/A, MC812xx/A
• Processor options: 2.5GHz quad-core Intel Core i5 with 6MB on-chip shared L3 cache/ 2.7GHz quad-core Intel Core i5 with 6MB on-chip shared L3 cache. Configurable to 2.8GHz quad-core Intel Core i7
• RAM options: 4GB (two 2GB) of 1333MHz DDR3 memory. Configurable to 16GB
• Storage: 2.5 GHz 500GB (7200 rpm) hard drive/ 2.7 GHz 1TB (7200 rpm) hard drive. Configurable to 2TB hard drive or 256GB SSD
• Graphics: 2.5 GHz AMD Radeon HD 6750M graphics processor with 512MB of GDDR5 memory/ 2.7 GHz AMD Radeon HD 6770M graphics processor with 512MB of GDDR5 memory
• Newest compatible operating system: macOS High Sierra 10.13.6

iMac (27-inch, Mid 2010)

• Model Label: iMac11,3
• Part Numbers:MC510xx/A, MC511xx/A
• Processor options: 3.2GHz Intel Core i3 processor with 4MB level 3 cache; supports Hyper-Threading/ 3.6GHz Intel Core i5 processor with 4MB level 3 cache; supports Hyper-Threading and Turbo Boost/ 2.8GHz Quad-Core Intel Core i5 processor with 8MB level 3 cache; supports Turbo Boost/ 2.93GHz Quad-Core Intel Core i7 processor with 8MB level 3 cache; supports Hyper-Threading and Turbo Boost
• RAM options: 4GB (two 2GB SO-DIMMs) of 1333MHz DDR3 SDRAM; four SO-DIMM slots support up to 16GB
• Storage: 1TB 7200-rpm Serial ATA hard drive. Optional 2TB 7200-rpm Serial ATA hard drive or 256GB SSD
• Graphics: 3.2GHz ATI Radeon HD 5670 graphics processor with 512MB of GDDR3 memory/ 2.8GHz ATI Radeon HD 5750 graphics processor with 1GB of GDDR5 memory
• Newest compatible operating system: macOS High Sierra 10.13.6

iMac (21.5-inch, Mid 2010)

• Model Label: iMac11,2
• Part Numbers:MC508xx/A, MC509xx/A
• Processor options: 3.06GHz Intel Core i3 processor with 4MB level 3 cache; supports Hyper-Threading/ 3.2GHz Intel Core i3 processor with 4MB level 3 cache; supports Hyper-Threading/ 3.6GHz Intel Core i5 processor with 4MB level 3 cache; supports Hyper-Threading and Turbo Boost
• RAM options: 4GB (two 2GB SO-DIMMs) of 1333MHz DDR3 SDRAM; four SO-DIMM slots support up to 16GB
• Storage: 3.06GHz 500GB 7200-rpm Serial ATA hard drive/ 3.2GHz 1TB 7200-rpm Serial ATA hard drive. Optional 2TB 7200-rpm Serial ATA hard drive
• Graphics: 3.06GHz ATI Radeon HD 4670 graphics processor with 256MB of GDDR3 memory/ 3.2GHz ATI Radeon HD 5670 graphics processor with 512MB of GDDR3 memory
• Newest compatible operating system: macOS High Sierra 10.13.6

iMac (27-inch, Late 2009)

• Model Label: iMac10,1
• Part Numbers:MB952xx/A, MB953xx/A
• Processor options: 3.06GHz Intel Core 2 Duo processor with 3MB shared L2 cache/ 3.33GHz Intel Core 2 Duo processor with 6MB shared L2 cache/ 2.66GHz quad-core Intel Core i5 processor with 8MB shared L3 cache; Turbo Boost dynamic performance up to 3.2GHz/ 2.8GHz quad-core Intel Core i7 processor with 8MB shared L3 cache; Turbo Boost dynamic performance up to 3.46GHz; Hyper-Threading for up to eight virtual cores
• RAM options: 4GB (two 2GB SO-DIMMs) of 1066MHz DDR3 SDRAM; four SO-DIMM slots support up to 16GB
• Storage: 1TB 7200-rpm Serial ATA hard drive. Optional 2TB 7200-rpm Serial ATA hard drive
• Graphics: 3.06GHz ATI Radeon HD 4670 graphics processor with 256MB of GDDR3 memory. Optional ATI Radeon HD 4850 graphics processor with 512MB of GDDR3 memory/ 2.66GHz ATI Radeon HD 4850 graphics processor with 512MB of GDDR3 memory
• Newest compatible operating system: macOS High Sierra 10.13.6

iMac (21.5-inch, Late 2009)

• Model Label: iMac10,1
• Part Numbers:MB950xx/A, MC413xx/A
• Processor options: 3.06GHz Intel Core 2 Duo processor with 3MB shared L2 cache/ 3.33GHz Intel Core 2 Duo processor with 6MB shared L2 cache
• RAM options: 4GB (two 2GB SO-DIMMs) of 1066MHz DDR3 SDRAM; four SO-DIMM slots support up to 16GB
• Storage: 3.06GHz 500GB 7200-rpm Serial ATA hard drive/ 3.33GHz 1TB 7200-rpm Serial ATA hard drive. Optional 2TB 7200-rpm Serial ATA hard drive
• Graphics: 3.06GHz NVIDIA GeForce 9400M graphics processor with 256MB of DDR3 SDRAM shared with main memory/ 3.33GHz ATI Radeon HD 4670 graphics processor with 256MB of GDDR3 memory
• Newest compatible operating system: macOS High Sierra 10.13.6

iMac (24-inch, Early 2009)

• Model Label: iMac9,1
• Part Numbers:MB418xx/A, MB419xx/A
• Processor options: 2.66GHz, 2.93GHz, or 3.06GHz Intel Core 2 Duo processor
• RAM options: 2GB (two 1GB SO-DIMMs) or 4GB (two 2GB SO-DIMMs) of 1066MHz DDR3 SDRAM; two SO-DIMM slots support up to 8GB
• Storage: 20-inch model with 2.66GHz processor 320GB 7200-rpm Serial ATA hard drive. Optional 640GB or 1TB 7200-rpm Serial ATA hard drive/ 24-inch model with 2.66GHz or 2.93GHz processor 640GB 7200-rpm Serial ATA hard drive. Optional 1TB 7200-rpm Serial ATA hard drive/ 24-inch model with 3.06GHz processor 1TB 7200-rpm Serial ATA hard drive
• Graphics: 20-inch and 24-inch model with 2.66GHz processor NVIDIA GeForce 9400M graphics processor with 256MB of DDR3 SDRAM shared with main memory/ 24-inch model with 2.93GHz processor NVIDIA GeForce GT 120 graphics processor with 256MB of GDDR3 memory OR NVIDIA GeForce GT 130 graphics processor with 512MB of GDDR3 memory OR ATI Radeon HD 4850 graphics processor with 512MB of GDDR3 memory/ 24-inch model with 3.06GHz processor NVIDIA GeForce GT 130 graphics processor with 512MB of GDDR3 memory OR ATI Radeon HD 4850 graphics processor with 512MB of GDDR3 memory
• Newest compatible operating system: OS X El Capitan 10.11.6

iMac (20-inch, Early 2009)

• Model Label: iMac9,1
• Part Numbers:MB417xx/A, MC019xx/A
• Processor options: 2.66GHz, 2.93GHz, or 3.06GHz Intel Core 2 Duo processor
• RAM options: 2GB (two 1GB SO-DIMMs) or 4GB (two 2GB SO-DIMMs) of 1066MHz DDR3 SDRAM; two SO-DIMM slots support up to 8GB
• Storage: 20-inch model with 2.66GHz processor 320GB 7200-rpm Serial ATA hard drive. Optional 640GB or 1TB 7200-rpm Serial ATA hard drive/ 24-inch model with 2.66GHz or 2.93GHz processor 640GB 7200-rpm Serial ATA hard drive. Optional 1TB 7200-rpm Serial ATA hard drive/ 24-inch model with 3.06GHz processor 1TB 7200-rpm Serial ATA hard drive
• Graphics: 20-inch and 24-inch model with 2.66GHz processor NVIDIA GeForce 9400M graphics processor with 256MB of DDR3 SDRAM shared with main memory/ 24-inch model with 2.93GHz processor NVIDIA GeForce GT 120 graphics processor with 256MB of GDDR3 memory OR NVIDIA GeForce GT 130 graphics processor with 512MB of GDDR3 memory OR ATI Radeon HD 4850 graphics processor with 512MB of GDDR3 memory/ 24-inch model with 3.06GHz processor NVIDIA GeForce GT 130 graphics processor with 512MB of GDDR3 memory OR ATI Radeon HD 4850 graphics processor with 512MB of GDDR3 memory
• Newest compatible operating system: OS X El Capitan 10.11.6