Maybe the first time you tried to run Apple Diagnostics, your power adapter wasn't plugged in. Send your serial number and reference codes to Apple by clicking Agree to send.To get more information on support and service options, click on Get started.Connect it and try again - this will help fix the problem. #Apple service diagnostics 3s162 download serial number There might be a couple of reasons why this happens: You can face the problem when Apple Diagnostics simply doesn't work. A part of the diagnostics system can be damaged.ĭouble-check you've disconnected everything except the keyboard, mouse, display, and speakers.

You can solve the problem by restarting the Mac while holding down Option+D. This will start an internet-based hardware test.

Firmware password might be the problem.

#Apple service diagnostics 3s162 download password Make sure you turn it off while performing hardware testing. In case Apple Diagnostics identifies no hardware issues - but your Mac is still misbehaving - maybe, software is the problem. #Apple service diagnostics 3s162 download software Often, Macs are slowing down, freezing, or behaving strangely due to full storage, malware, leftovers from uninstalled apps, large and old files.

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