Why your MacBook model number is so important
Your MacBook is working fine. Until you suddenly need a new charger. Or that one part you need replaced. Then the hassle begins: what model do you have again? A2337? A1932? That small print on the bottom is illegible. And in the settings, all you see is "MacBook Air 13-inch." But there are dozens of them.
You're not the only one running into this problem—even the most experienced Apple users, with their AirPods and all their accessories, often don't know their exact model number. Yet, that number is more important than you think . It determines not only which components will fit, but also the value of your MacBook when you sell it. And whether that new software will even run.
Luckily, you can find out exactly which model you have in three simple steps – without any technical knowledge or hassle.
Useful links
- View our collection of refurbished MacBooks
- Find the right MacBook keyboard
- Discover all MacBook accessories
Why the model number is essential
Every MacBook has a unique model number that begins with the letter "A" followed by four digits. This number tells you everything: from the year of manufacture to the exact specifications. The difference between an A2337 and an A2338 may seem small, but it does determine whether you have an M1 Air or Pro. This knowledge is essential for repairs, upgrades, or sales.
The model number prevents costly mistakes, such as ordering the wrong battery or buying incompatible RAM. Apple Support also often requests this number first when installing specific software or troubleshooting issues.
Method 1: Via the Apple menu (fastest option)
The easiest way works directly from macOS:
- Click on the Apple logo at the top left of your screen
- Select 'About This Mac'
- Click on 'System Report'
- Under 'Hardware' you will see the model number
In newer versions of macOS, you'll find information like "MacBook Air (M1, 2020)" directly here. The exact model number is listed slightly lower in the overview. This method always works, unless your system won't boot anymore.
Extra tip for older systems
Is your MacBook still running macOS Monterey or earlier? Then you'll see the model number right in the first window of "About This Mac." Apple has reorganized this in newer versions, but the information remains available.
Method 2: Physically on the enclosure
The model number is engraved on the bottom of every MacBook. On older models (before 2012), it's often easy to read. On newer models, the text becomes increasingly smaller and fainter.
Where exactly to look?
- MacBook Air : at the bottom near the hinges
- MacBook Pro : centered on the bottom
- 12-inch MacBook : in addition to the regulatory markings
If necessary, use your iPhone's flashlight to better read the small print. Note: the serial number is also there, but it usually begins with letters. The model number always begins with an 'A' followed by four numbers.
Method 3: via Terminal (advanced)
Tech-savvy users can use Terminal for detailed system information:
- Open Terminal (via Spotlight or Applications > Utilities)
- Type:
system_profiler SPHardwareDataType | grep "Model Identifier" - Press Enter
You'll now see the internal model number, such as "MacBook Air 10.1." This isn't the A-number, but it does indicate exactly which generation you have. You can link this identifier to the official model number via Apple's support pages.
Complete list of MacBook model numbers by year
MacBook Air models
2020-2024:
- A2681 - MacBook Air 15-inch (M2, 2023)
- A2337 - MacBook Air 13-inch (M1, 2020)
- A2179 - MacBook Air 13-inch (Intel, 2020)
2018-2019:
- A1932 - MacBook Air 13-inch (2018-2019)
- A2337 - MacBook Air 13-inch (M1, 2020)
2015-2017:
- A1466 - MacBook Air 13-inch (2015-2017)
- A1465 - MacBook Air 11-inch (2015)
MacBook Pro models
2021-2024:
- A2779 - MacBook Pro 14-inch (M3, 2023)
- A2780 - MacBook Pro 16-inch (M3, 2023)
- A2442 - MacBook Pro 14-inch (M1 Pro/Max, 2021)
- A2485 - MacBook Pro 16-inch (M1 Pro/Max, 2021)
2019-2020:
- A2338 - MacBook Pro 13-inch (M1, 2020)
- A2251 - MacBook Pro 13-inch (Intel, 2020)
- A2289 - MacBook Pro 13-inch (Intel, 2020)
- A2141 - MacBook Pro 16-inch (2019)
What to do with your model number
Now that you've found the number, you can:
- Finding compatible accessories : Not every case or adapter fits every model
- Determine maximum RAM : Older models often have upgradable memory
- Check software compatibility : Newer macOS versions do not run on all models
- Estimating value : for sale or trade-in, the exact model is crucial
- Troubleshooting : At Apple Support or forums, the model number is often the first question
Difference between model number and serial number
The model number (A-number) identifies the MacBook model. Multiple units share the same model number. The serial number is unique to your specific device. You'll need the serial number for warranty checks, and the model number is usually required for ordering parts.
Common Problems Finding
- Illegible engraving : With heavy use, the text on the bottom fades. Try using an angled light or take a photo with a flash from different angles.
- System won't boot : Without access to macOS, things get more complicated. First, check the bottom. If that doesn't work, check the original packaging or invoice for the model number.
- Replacement housing : a different base plate is sometimes used for repairs. The actual model can only be found using the software method.
Practical applications of model number knowledge
When buying refurbished
When purchasing a refurbished MacBook, the model number is your most important reference. It tells you exactly which processor, how many USB-C ports, and what screen technology you'll get. For example, an A2338 (M1 Pro) performs significantly better than an A2251 (Intel) from the same year.
For DIY repairs
Want to replace your battery or upgrade your SSD yourself? The model number determines which components are compatible. An incorrect component often doesn't even physically fit, but it can cause damage if forced into the system.
Future-proofing and model numbers
Apple supports MacBooks with software updates for an average of 7-8 years. The model number indicates how much longer yours will last. For example, models from before 2018 no longer support macOS Sonoma. This is an important consideration for business or academic use.
The transition to Apple Silicon (M1, M2, M3) also impacts lifespan. These chips are more efficient and likely receive longer support than Intel models from the same period. The model number directly reveals whether you have an Intel or Apple Silicon variant.
The model number: your MacBook identification document
So, finding your MacBook model number isn't rocket science. You can find the correct A-number in under a minute via the Apple menu, the bottom of your device, or Terminal. Those four digits make the difference between ordering the right parts and ending up with unusable parts.
Whether you need to replace a faulty keyboard , determine its resale value, or simply want to know if that new macOS update will even run, knowing the model number will prevent costly mistakes and unnecessary frustration. Keep this number in a safe place, as you'll need it more often than you think.
