If your screen still isn't working, you'll want to give Appel Support a call, and they should be able to get you back on track.
Unfortunately, if you've tried all the tips above, it may be time to call in the big guns. Go System Preferences > Displays and then try connecting your external monitor to your Mac with that Displays menu open. If your HDMI device isnt receiving audio from your Mac: Choose Apple menu > System Settings (or System Preferences), then click Sound. Make sure that the HDMI and power cables are connected properly. To get HDMI to work on your Mac, you will need to plug the cable in, and then open the Apple menu, click System Preferences, and choose the Displays option. I know this sounds a little odd, but ultimately, it's how I got my external display to work with my iMac (2021). How to Fix HDMI Signal After Catalina Update Restart your Mac. Connect your monitor with display settings open HDMI Not Working Mac: Apply These Solutions To Fix Display Issues. If that doesn't work, try rebooting your Mac, but plug in your external display before you power on your Mac again. I would actually suggest trying two different types of reboots.įirst, reboot your Mac and then plug in your external display once your Mac is powered on and you're logged in. Rebooting your Mac is a great way to shock the system and fix any niggling problems you might be experiencing.
Plus, if you're connecting your monitor via a USB-C hub, you'll want to try hooking that USB-C hub to a different port as well. Specifically, on the M1 iMac and the M1 Mac mini, you should be using a Thunderbolt port to connect to any monitor. If you're using a USB-C connection for your monitor, try a different port to see if that resolves the issue.
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