Type “sudo NVRAM” and press Enter/Return to open the NVRAM file located at /etc/NVRAM in the Terminal window.

Once you’re in Single-User Mode, open Terminal by pressing Command + Spacebar, type “Terminal,” and press Enter/Return.Boot your MacBook and hold down the Option key (Alt on Mac) while you boot to choose a boot mode, such as Safe Mode or Single-User Mode.These are the steps to follow if your device is not working. This guide will help you to fix MacBook HDMI not working.

If your Mac has an AMD Radeon GPU with a Thunderbolt 3 interface, you should plug in two monitors using DisplayPort cables and then use the built-in display adapter to connect to external displays and projectors through HDMI cables.If your Mac has an IGP, you can use the built-in display adapter to connect to external displays and projectors through HDMI cables.Check if your Mac has an integrated graphics card (IGP) or an AMD Radeon GPU with a Thunderbolt 3 interface.If you’re experiencing this issue, follow these steps: This problem can be fixed by replacing the cable or the port itself. The most common issue with the HDMI port on a MacBook is that it doesn’t work at all, or it doesn’t work properly. This is a complete guide on how to fix MacBook HDMI not working. One solution is checking your ports and cables for damage or dirt build-up or if they have become loose over time. You may have to try a few different things before finding what works for your device. Some users report that unplugging the MacBook and plugging it back in works for them, but this isn’t always the case. There are a few solutions that you can try if you are experiencing this issue. The most common cause of this issue is that the MacBook has an incompatible HDMI port. With so many people using MacBooks, this problem is likely to happen to you at some point. MacBook HDMI not working can be a frustrating experience. 9 Conclusion Why is MacBook HDMI Not Working

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