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The AppleCare Support Community will permanently close on November 20, 2026. Starting today, the site will no longer accept new posts and is available in a read-only state.
You can continue to find trusted guidance and support on the official Apple Support site.
We want to thank the community members who have contributed their time and expertise to help others with their Apple products.
I’m trying to use my Mac connected to a projector by HDMI. The projector isn’t working but I set the HDMI output to main monitor and now every time I plug in the hdmi cord the screen goes to a blank page and I cannot access the settings menu to switch it back.
[Re-Titled by Moderator]
MacBook Pro 13″, macOS 12.6
wootyman Said:
"HDMI reset: I’m trying to use my Mac connected to a projector by HDMI. The projector isn’t working but I set the HDMI output to main monitor and now every time I plug in the hdmi cord the screen goes to a blank page and I cannot access the settings menu to switch it back."
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Try Mirroring the Screen with the Keyboard:
wootyman Said:
"HDMI reset: I’m trying to use my Mac connected to a projector by HDMI. The projector isn’t working but I set the HDMI output to main monitor and now every time I plug in the hdmi cord the screen goes to a blank page and I cannot access the settings menu to switch it back."
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Try Mirroring the Screen with the Keyboard:
Command-BrightnessDown toggles the sense of [√] Mirror displays, and allows each Mac to have its own resolution and separate pictures again.
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Command-BrightnessDown (the shortcut The Littles proposed, but they broke out the two cases for your convenience) can be applied even if the screen is bonkers.
The Arrangement pane screen posted afterward is "the long way" and helps illustrate the idea of Extended Desktop, which is what you will be switching TO.
The problem is, I can’t access any of the settings menus while the hdmi is plugged in. It immediately goes to the screen saver.
Every time I plug in the hdmi cord on Mac the screen goes to a blank page
