iMac Specs and Model Numbers
We list 12 iMac models released from 2015 to 2024, across 4 lines: iMac 24-inch, iMac 27-inch, iMac 21.5-inch, iMac Pro 27-inch. Each one links to its full specs: the configurations Apple sold, chip, model identifier and model number.
Apple menu > About This Mac shows the model, year and chip. Not sure? About This Mac shows the chip, memory and storage.
| Model | Year | Chip | Identifier | Model number | Storage |
|---|---|---|---|---|---|
| iMac 24-inch M4 (2024) | 2024 | M4 | Mac16,2 / Mac16,3 | — | 256GB to 2TB |
| iMac 24-inch M3 (2023) | 2023 | M3 | Mac15,4 / Mac15,5 | — | 256GB to 2TB |
| iMac 24-inch M1 (2021) | 2021 | M1 | iMac21,1 / iMac21,2 | — | 256GB to 2TB |
| iMac 27-inch Retina 5K (2020) | 2020 | Intel 10th gen | iMac20,1 / iMac20,2 | A2115 | 256GB SSD to 8TB SSD |
| iMac 27-inch Retina 5K (2019) | 2019 | Intel 9th gen | iMac19,1 | A2115 | 256GB SSD to 3TB Fusion Drive |
| iMac 21.5-inch Retina 4K (2019) | 2019 | Intel 8th gen | iMac19,2 | A2116 | 256GB SSD to 1TB SSD |
| iMac Pro 27-inch (2017) | 2017 | Intel Xeon W | iMacPro1,1 | A1862 | 1TB SSD to 4TB SSD |
| iMac 27-inch Retina 5K (2017) | 2017 | Intel 7th gen | iMac18,3 | A1419 | 256GB SSD to 3TB Fusion Drive |
| iMac 21.5-inch Retina 4K (2017) | 2017 | Intel 7th gen | iMac18,2 | A1418 | 256GB SSD to 1TB SSD |
| iMac 21.5-inch (2017, non-Retina) | 2017 | Intel 7th gen | iMac18,1 | A1418 | 256GB SSD to 1TB Fusion Drive |
| iMac 27-inch Retina 5K (Late 2015) | 2015 | Intel 6th gen | iMac17,1 | A1419 | 256GB SSD to 3TB Fusion Drive |
| iMac 21.5-inch Retina 4K (Late 2015) | 2015 | Intel 5th gen | iMac16,2 | A1418 | 256GB SSD to 2TB Fusion Drive |
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