Apple Footer. Trade‑in value based on 2019 15-inch MacBook Pro. Trade‑in values will vary based on the condition, year, and configuration of your trade‑in device. You must be at least 18 years old to be eligible to trade in for credit or for an Apple Store Gift Card. The Apple Hardware Test. The Apple® Hardware Test is an important troubleshooting utility that began shipping with new Macintosh® computers sometime in the year 2000. If your Mac predates the inclusion of the Apple Hardware Test, see the section 'My Mac predates the Apple Hardware Test' below. Spammer codes le bot 8.4.
After isolating an issue on your Mac to a possible hardware issue, you can use Apple Diagnostics to help determine which hardware component might be causing the issue. Apple Diagnostics also suggests solutions and helps you contact Apple Support for assistance.
Folder icons for mac os x. If your Mac was introduced before June 2013, it uses Apple Hardware Test instead.
Apple Mac Pro Refurbished Store
![Mac Mac](/uploads/1/1/9/8/119846593/759166442.png)
How to use Apple Diagnostics
- Disconnect all external devices except your keyboard, mouse, display, Ethernet connection (if applicable) and connection to mains power.
- Make sure that your Mac is on a hard, flat and stable surface with good ventilation.
- Shut down your Mac.
- Turn on your Mac, then immediately press and hold the D key on your keyboard. Keep holding it down until you see a screen asking you to choose your language. When Apple Diagnostics knows your language, a progress bar will appear indicating that your Mac is being checked:
- Checking your Mac takes two or three minutes. If any issues are found, Apple Diagnostics suggests solutions and provides reference codes. Note the reference codes before continuing.
- Choose from these options:
- To repeat the test, click ”Run the test again” or press Command (⌘)-R.
- For more information, including details about your service and support options, click ”Get started” or press Command-G.
- To restart your Mac, click Restart or press R.
- To shut down, click Shut Down or press S.
If you choose to get more information, your Mac will start up from macOS Recovery and display a web page asking you to choose your country or region. Click ”Agree to send” to send your serial number and reference codes to Apple. Then follow the on-screen service and support instructions. When you've finished, you can choose Restart or Shut Down from the Apple menu.
This step requires an Internet connection. If you're not connected to the Internet, you'll see a page describing how to get connected.
Learn more
If holding down the D key when starting up your device doesn't start Apple Diagnostics:
Apple Mac Pro Desktop
- If you're using a firmware password, turn it off. You can turn it on again after using Apple Diagnostics.
- Hold down Option-D when starting up your device to attempt to start Apple Diagnostics over the Internet.