#APPLE DIAGNOSTICS ERROR CODES HOW TO#
#APPLE DIAGNOSTICS ERROR CODES CODE#

#APPLE DIAGNOSTICS ERROR CODES CODE#

If you receive a battery-service related code (PPT004), Apple specifically recommends re-running Apple Diagnostics over the Internet. If you get multiple tests with the same result, your confidence in the source of the problem is that much greater. If you don’t see the problem on the repeated test run, it might be either intermittent or a false positive. If you do see a problem, it’s always a good idea to repeat the test. Once the test is finished, you can repeat the test, find more information about the error codes, or shut down or restart your Mac normally. Once it’s finished, you’ll see the relevant diagnostic reference codes appear on the screen.ĥ. Wait a few minutes for Apple Diagnostics to finish running. Restart your Mac while holding down the D key on your keyboard.Ĥ. Disconnect all external devices from your Mac, except for your mouse and keyboard.ģ. This reduces the number of confounding factors that could complicate a diagnosis.ġ. It helps if you disconnect all your unnecessary peripherals first, leaving the keyboard and mouse connected.

#APPLE DIAGNOSTICS ERROR CODES HOW TO#

While it can only detect the problems that it was programmed to detect, and its analysis isn’t particularly nuanced, Apple Diagnostics can give you an idea of the severity and type of problem you’re facing.Īlso read: How to Read macOS Crash Reports to Troubleshoot Your MacĪpple Diagnostics must be run from boot, requiring you to restart your Mac. You can use it to search for problems in all of the Mac’s major systems, from input devices like the keyboard and trackpad to display devices like the graphics processor to the core of the computer, the CPU, storage, and memory. It can run diagnosis algorithms on your Mac’s hardware without visiting the Apple Store. Except that’s not really true: you can use Apple Diagnostics to access Apple’s diagnostics package from any Mac.Īpple Diagnostics is a diagnostic tool built into every Mac. Diagnostic programs that can accomplish this process are typically only available to authorized shops.

Especially when it comes to hardware, certain types of failure can cause programmatically-detectable signals that reveal the cause of the problem. Computers tend to fail in predictable ways.

Apple diagnostics error codes