How to Identify Your MacBook Model Before Ordering Replacement Parts (Full Guide)

When it comes to repairing or upgrading your MacBook, one of the most important steps is correctly identifying the model you own. Ordering the wrong part—whether it’s a battery, keyboard, logic board, or display—can lead to wasted time, unnecessary costs, and even damage to your device.

Because Apple has released dozens of MacBook models that often look nearly identical on the outside, relying on just the year or size isn’t enough. Instead, you need to know your exact model identifier or A-number before making a purchase.

This guide will walk you step by step through every reliable way to identify your MacBook, ensuring you always buy the right replacement parts.

Why Identifying Your MacBook Model Matters

Apple’s MacBook lineup—spanning the MacBook, MacBook Air, and MacBook Pro—has gone through multiple generations. Some differences are small (like a different keyboard layout), while others are major (such as a change in screen connectors or battery sizes).

Here are a few examples of why accuracy matters:

• A MacBook Pro 13-inch 2017 (A1708) uses a completely different battery than a MacBook Pro 13-inch 2017 with Touch Bar (A1706).

• A 2015 MacBook Air keyboard will not fit a 2017 MacBook Air, even though they look nearly identical.

• The shift from Intel processors to Apple Silicon (M1, M2, M3) introduced new logic board and memory configurations, making parts non-interchangeable.

By identifying your exact model, you avoid these compatibility pitfalls.

Method 1: Use “About This Mac”

The simplest way to check your MacBook model is directly from macOS.

1. Click the Apple logo  in the top-left corner of your screen.

2. Select About This Mac.

3. A window will appear with the following key details:

   • Model Name (e.g., MacBook Pro 14-inch, 2021)

   • Processor/Chip (Intel or Apple M1/M2/M3)

   • Memory (RAM)

This information is enough for general repairs, like ordering chargers, cases, or adapters.

Method 2: Find the Model Identifier

For ordering internal replacement parts, the model identifier is the most precise reference.

Here’s how to find it:

1. Open About This Mac → System Report.

2. Under Hardware Overview, look for:

   • Model Identifier (e.g., MacBookPro14,3).

This code uniquely identifies your machine and is what most suppliers use to ensure compatibility.

Example of Model Identifiers

Method 3: Use the Serial Number

Every MacBook has a serial number that can be used to confirm its exact model.

• Where to find it:

  • Printed on the bottom case near the hinge.

  • In About This Mac.

  • On your original box or purchase receipt.

Once you have the serial number, enter it on Apple’s official Check Coverage page. This will give you the exact model and configuration details.

Method 4: Check the Model Number (A-Number)

On the underside of your MacBook, you’ll find a model number beginning with the letter A (e.g., A1708, A2337).

While this number is helpful, be cautious:

• A single A-number can sometimes refer to multiple model variations.

• Example: Both the MacBook Pro 13-inch with and without Touch Bar (2017) are part of the A170X family, but use different batteries and keyboards.

That’s why you should always cross-reference the A-number with the model identifier for complete accuracy.

Method 5: When Your MacBook Won’t Power On

If your MacBook isn’t turning on, you won’t be able to access “About This Mac.” In this case:

• Flip the MacBook over and check for the A-number etched into the bottom case.

• Remove the bottom cover and check the internal component labels (if you’re comfortable doing so).

• If possible, look up the serial number on Apple’s support site.

Best Practices Before Ordering Replacement Parts

To minimize mistakes, follow these steps before buying any parts:

Confirm with Multiple Identifiers – Use both the model identifier (MacBookPro14,1) and the A-number (A1708).
Check Supplier Compatibility Lists – Reputable sellers will list supported models clearly.
Avoid Guessing by Year Alone – A “2017 MacBook Pro” could refer to different internal builds.
Contact the Seller – If you’re unsure, provide your model identifier or serial number to verify compatibility.

Common Replacement Parts That Require Exact Model Info

Some components are particularly model-specific:

• Batteries – Slightly different shapes and connector placements.

• Keyboards/Top Cases – Vary by layout, design, and generation.

• Logic Boards – Not interchangeable between Intel and Apple Silicon.

• Displays – Connector types and resolution differ even between same-sized models.

• Trackpads – Different dimensions and cable alignments.

Quick Reference: Popular MacBook Model Numbers

Ordering MacBook replacement parts doesn’t have to be stressful. By taking a few extra minutes to identify your exact model through About This Mac, the model identifier, serial number, or A-number, you can avoid costly mistakes.

Whenever possible, verify your findings against Apple’s official resources and double-check with the supplier before buying. With this approach, you’ll always have the right part for your MacBook repair or upgrade.