PFM001-PFM007: System Management Controller (SMC) issue.NDL001: Indicates problems related to Bluetooth hardware.NDD001: Hardware issues related to USB devices.CNW007-CNW008: Wi-Fi hardware has been detected.CNW001-CNW006: Problems related to Wi-Fi.The codes point specifically to a particular error, which might help you quickly figure out the next steps.īelow you can find diagnostic reference codes related to some of the most common issues with your Mac. Some common Apple Diagnostics codesĪfter conducting a Mac hardware test, you will be getting the results with a list of found issues and their respective codes. However, this is more time-consuming than the usual hardware inspection. Note: You can also Perform extended testing if you want to test your Mac thoroughly. Now, click Restart or Shut Down to exit the Apple Hardware Test.After the test is completed, you can view the test results at the bottom-right.Click Test or press T or return key to initialize the hardware test.Now, select the language and click the right arrow or press return.Press and hold the D key until the Apple Hardware Test icon appears.Press the power button to turn on your Mac.Here’s how you can identify hardware issues on your older Mac.įirst, make sure that you’re fulfilling the prerequisites specified earlier before proceeding with the steps mentioned below. Macs manufactured before 2013 use a local version called Apple Hardware Tests. Not all Macs can run internet-based hardware tests. Source: Apple What if you are using older Macs (manufactured before 2013)? Now, select the language using arrow keys.Release the key when asked to choose the language.Press and hold the D key as your Mac boots up.Use Apple Diagnostics for Intel processor So, you will have to follow the steps based on your model to verify if your Mac’s hardware is working correctly. Last year, Apple started the transition from Intel processors to M1 chips in Macs. How to run Apple Diagnostics to check for Mac hardware issues Position your Mac on a flat and hard surface.Disconnect all peripherals except keyboard, mouse, ethernet, and monitor.Requirements for launching Apple Diagnostics For example, it checks for an issue with the logic board, RAM, power controller, and wireless components of Mac. What to do if Apple Diagnostics is not working?Īpple Diagnostics is a built-in tool in Mac that tests its internal hardware for any anomalies.What if you are using older Macs (manufactured before 2013)?.How to run Apple Diagnostics to check for Mac hardware issues.In this article, I have detailed how to use Apple Diagnostics on your Mac. This will help you find the root cause of the issue in less time. If your Mac is acting funny, use Apple Diagnostics first to verify if it’s a hardware or software problem. However, like any electronic gadgets, they are prone to occasional hiccups.
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