The system automatically checks whether a reset is required during startup. M1 Macs don’t have a keyboard shortcut to reset NVRAM. Hold these keys until macOS restarts, then release them.
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Power up your Mac and immediately press the Option + Command + P + R keys.ģ. If these settings become corrupted, then it can cause a range of technical issues, so resetting your NVRAM may resolve the issues you’re experiencing with your external monitor.īefore we begin, be aware that resetting NVRAM will also reset your system settings and preferences, so you may need to spend some time reapplying these settings following an NVRAM reset.Ģ. Non-volatile random-access memory (NVRAM) is a small amount of memory where macOS stores all the settings it needs to access quickly, including some settings related to the display. Resetting NVRAM: Wipe Your Non-Volatile RAM