Summary

If your MacBook is having major hardware problems, the Apple Diagnostics menu can help make sense of what's wrong. Champpixs/Getty Images Add Engadget on Google: Preferred Source Google Discover A MacBook that keeps shutting down, develops display problems or suddenly stops recognizing its keyboard can leave you guessing whether the problem is hardware or software. Apple Diagnostics can narrow that down by testing hardware inside the Mac. Despite the "diagnostic menu" wording you may see online, it isn't something you'll find buried in System Settings.

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