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til/mac/run-a-hardware-check.md
2018-02-14 19:41:36 -06:00

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# Run A Hardware Check
If your Mac is behaving in an odd way, there may be an issue with some piece
of the hardware -- such as the RAM.
You can perform a hardware check in order to chase down a diagnosis.
- Shutdown your machine
- Boot your machine
- While it is booting, hold down the `d` key
At this point, the machine should have booted into a special hardware check
mode. Select your preferred language, the hardware check will be performed,
and any issues will be reported.
h/t Dillon Hafer