How to Use Apple Diagnostics on macOS 13

Apple Diagnostics is a built-in troubleshooting tool in macOS 13 Ventura designed to identify potential hardware failures in components such as the logic board, battery, memory, and wireless modules. This guide covers the essential preparation steps, the specific startup procedures for both Apple silicon and Intel-based Mac models, and how to read the resulting diagnostic reference codes to determine if your Mac requires service.

Prepare Your Mac

Before initiating the diagnostic test, complete the following steps to ensure accurate results:

  1. Shut down your Mac completely.
  2. Disconnect all external peripherals, including external drives, monitors, and docks. Leave only your keyboard, mouse or trackpad, display (if using a desktop Mac), and Ethernet cable connected if applicable.
  3. Plug your Mac into an AC power outlet using its official power adapter.
  4. Place the computer on a hard, flat, well-ventilated surface to allow proper airflow during the test.

Run Apple Diagnostics on Apple Silicon (M1, M2)

Follow these steps if your Mac uses an Apple silicon chip:

  1. Press and hold the Power button (Touch ID button) on your Mac.
  2. Continue holding the button as the Mac powers on until you see the Loading startup options screen.
  3. Press and hold Command (⌘) + D on your keyboard.
  4. Release the keys when the diagnostics progress screen appears.

Run Apple Diagnostics on Intel-Based Macs

Follow these steps if your Mac uses an Intel processor:

  1. Press the Power button to turn on your Mac.
  2. Immediately press and hold the D key on your keyboard.
  3. Release the key when you see a progress bar or a prompt asking you to choose a language.
  4. If holding D does not work, shut down the Mac, turn it back on, and immediately press and hold Option + D to start Apple Diagnostics over the internet.

View and Interpret Test Results

Once the test begins, a progress bar will show the status of the scan, which typically takes a few minutes.

When testing is complete, Apple Diagnostics displays the findings on your screen:

  • No issues found: Indicates code ADP000, meaning no hardware defects were detected.
  • Issue detected: If a hardware fault is detected, the screen will display one or more reference codes (such as PPT004 for battery issues or VFD001 for display issues) along with brief explanations.

Make a note of any reference codes displayed. You can press R to run the test again, S to restart your Mac normally, or Shut Down to turn off the computer. If hardware issues are detected, provide the generated reference codes to Apple Support or an authorized service provider to streamline the repair process.