Model number
Example: A1311, A1278, A1466.
Usually printed on the Mac’s casing.
Apple model guide · Mac nomenclature
Many Apple devices, especially Macs, are identified by a technical designation made up of a letter A followed by four digits, such as A1311, A1278, A1466 or A1418.
This number is often printed on the device’s casing and is very useful to correctly identify an iMac, MacBook Pro, MacBook Air, Mac mini, Mac Studio or Mac Pro before carrying out a repair, buying a part or requesting a technical diagnosis.
A model number such as A1311 is a physical reference used by Apple to group devices of the same family or design. It doesn’t always identify a single exact configuration, since the same A-number can cover several years or internal revisions.
For example, the iMac A1311 refers to several 21.5-inch iMac models made between 2009 and 2011. That is why, in a professional repair, the A-number is checked together with the year, the Mac internal identifier, the serial number and the actual symptoms of the device.
Example: A1311, A1278, A1466.
Usually printed on the Mac’s casing.
Example: iMac11,2, MacBookPro9,2.
Shown in macOS System Information.
Allows far more precise identification of the device’s year, configuration and exact specifications.
Listing by families
| A model | Typical device | Size / approximate generation |
|---|---|---|
| A1311 | iMac | 21.5" Unibody, approx. 2009-2011 |
| A1312 | iMac | 27" Unibody, approx. 2009-2011 |
| A1418 | iMac | 21.5" Slim, approx. 2012-2019 |
| A1419 | iMac | 27" Slim / Retina 5K, approx. 2012-2020 |
| A2116 | iMac | 21.5" Retina 4K, 2019 |
| A2115 | iMac | 27" Retina 5K, 2019-2020 |
| A2438 | iMac | 24" M1, 2021 |
| A2873 | iMac | 24" M3, 2023 |
| A3247 | iMac | 24" M4, 2024 |
| A model | Typical device | Size / approximate generation |
|---|---|---|
| A1150 | MacBook Pro | 15" Early 2006 |
| A1151 | MacBook Pro | 17" 2006 |
| A1211 | MacBook Pro | 15" Late 2006 |
| A1212 | MacBook Pro | 17" Late 2006 |
| A1226 | MacBook Pro | 15" 2007 |
| A1229 | MacBook Pro | 17" 2007 |
| A1260 | MacBook Pro | 15" Early 2008 |
| A1261 | MacBook Pro | 17" Early 2008 |
| A1278 | MacBook Pro | 13" Unibody, 2008-2012 |
| A1286 | MacBook Pro | 15" Unibody, 2008-2012 |
| A1297 | MacBook Pro | 17" Unibody, 2009-2011 |
| A1425 | MacBook Pro Retina | 13" Late 2012 / Early 2013 |
| A1502 | MacBook Pro Retina | 13" 2013-2015 |
| A1398 | MacBook Pro Retina | 15" 2012-2015 |
| A1706 | MacBook Pro | 13" Touch Bar, 2016-2017 |
| A1708 | MacBook Pro | 13" without Touch Bar, 2016-2017 |
| A1707 | MacBook Pro | 15" Touch Bar, 2016-2017 |
| A1989 | MacBook Pro | 13" Touch Bar, 2018-2019 |
| A1990 | MacBook Pro | 15" Touch Bar, 2018-2019 |
| A2159 | MacBook Pro | 13" 2019 |
| A2141 | MacBook Pro | 16" 2019 |
| A2251 | MacBook Pro | 13" 2020 Intel |
| A2289 | MacBook Pro | 13" 2020 Intel |
| A2338 | MacBook Pro | 13" M1 2020 / M2 2022 |
| A2442 | MacBook Pro | 14" M1 Pro / M1 Max, 2021 |
| A2485 | MacBook Pro | 16" M1 Pro / M1 Max, 2021 |
| A2779 | MacBook Pro | 14" M2 Pro / M2 Max, 2023 |
| A2780 | MacBook Pro | 16" M2 Pro / M2 Max, 2023 |
| A2918 | MacBook Pro | 14" M3, 2023 |
| A2992 | MacBook Pro | 14" M3 Pro, 2023 |
| A2991 | MacBook Pro | 14" M3 Max, 2023 |
| A2993 | MacBook Pro | 16" M3 Pro, 2023 |
| A2994 | MacBook Pro | 16" M3 Max, 2023 |
| A3112 | MacBook Pro | 14" M4, 2024 |
| A3185 | MacBook Pro | 14" M4 Pro, 2024 |
| A3401 | MacBook Pro | 14" M4 Max, 2024 |
| A3186 | MacBook Pro | 16" M4 Pro, 2024 |
| A3403 | MacBook Pro | 16" M4 Max, 2024 |
| A model | Typical device | Size / approximate generation |
|---|---|---|
| A1237 | MacBook Air | 13" Original, 2008 |
| A1304 | MacBook Air | 13" 2008-2009 |
| A1370 | MacBook Air | 11" 2010-2011 |
| A1465 | MacBook Air | 11" 2012-2015 |
| A1369 | MacBook Air | 13" 2010-2011 |
| A1466 | MacBook Air | 13" 2012-2017 |
| A1932 | MacBook Air Retina | 13" 2018-2019 |
| A2179 | MacBook Air Retina | 13" 2020 Intel |
| A2337 | MacBook Air | 13" M1, 2020 |
| A2681 | MacBook Air | 13" M2, 2022 |
| A2941 | MacBook Air | 15" M2, 2023 |
| A3113 | MacBook Air | 13" M3, 2024 |
| A3114 | MacBook Air | 15" M3, 2024 |
| A3240 | MacBook Air | 13" M4, 2025 |
| A3241 | MacBook Air | 15" M4, 2025 |
| A model | Typical device | Size / approximate generation |
|---|---|---|
| A1181 | MacBook white / black | 13" 2006-2010 |
| A1278 | MacBook aluminium | 13" Late 2008 |
| A1342 | MacBook white Unibody | 13" 2009-2010 |
| A1534 | MacBook Retina | 12" 2015-2017 |
| A model | Typical device | Approximate generation |
|---|---|---|
| A1103 | Mac mini | 2005 |
| A1176 | Mac mini | 2006-2007 |
| A1283 | Mac mini | 2009 |
| A1347 | Mac mini | 2010-2014 |
| A1993 | Mac mini | 2018 Intel |
| A2348 | Mac mini | M1, 2020 |
| A2816 | Mac mini | M2 / M2 Pro, 2023 |
| A3238 | Mac mini | M4 / M4 Pro, 2024 |
| A model | Typical device | Approximate generation |
|---|---|---|
| A2615 | Mac Studio | M1 Max / M1 Ultra, 2022 |
| A2901 | Mac Studio | M2 Max / M2 Ultra, 2023 |
| A model | Typical device | Approximate generation |
|---|---|---|
| A1186 | Mac Pro tower | 2006-2012 |
| A1481 | Mac Pro cylinder | 2013 |
| A1991 | Mac Pro tower | 2019 |
| A2304 | Mac Pro rack | 2019 |
| A2786 | Mac Pro Apple silicon | 2023 |
Some model numbers are reused across different generations or families. That is why you shouldn’t diagnose a device based on the A-number alone. It’s a very useful reference, but it must be cross-checked with the exact year, the serial number and the device symptoms.
Can correspond to a 13-inch aluminium MacBook or to several 13-inch MacBook Pro Unibody models.
Identifies several 21.5-inch iMacs from different generations, especially between 2009 and 2011.
Groups together different 21.5-inch iMac Slim models, with significant variations depending on year and configuration.
Refers to various 13-inch MacBook Air models, produced over several years with internal differences.
On many MacBooks it appears on the lower case. On iMacs it’s often on the bottom of the stand or on the rear of the unit.
If the device boots, you can check the information from the Apple menu by opening About This Mac.
The serial number allows you to pinpoint the exact model, year and original configuration of the device.
Knowing the model number helps to better guide the repair. Diagnosing an iMac A1311 that won’t power on, a MacBook Pro A1278 with a charging fault, a MacBook Air A1466 with a dead battery or an iMac A1418 with display issues.
Each family has common faults, compatible parts, opening procedures and specific technical risks. That is why a full technical inspection is recommended before replacing components.
Apple technical diagnosis
If your Mac doesn’t power on, won’t boot or you can’t access System Information, you can send us a photo of the model number, the serial number or the underside of the device. We’ll help you identify it before assessing the repair.
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