MacBook Pro turns off projector in sleep mode

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Level 1

4 points

MacBook Pro turns off projector in sleep mode

How do I stop my MacBook Pro turning the projector off when it goes into sleep mode (even when the display screen is on freeze)? (The PCs my colleagues use dont have this problem).

It's plugged in with a HDMI to a wall plate that connects to the projector system in my workplace. The projector is controlled by a wall panel.

I dont want to turn off sleep mode on my computer.

I dont know how to adjust the signal so the projector doesnt interpret it as 'no input' and why this is different for my mac vs PC?

Posted on Mar 16, 2026 10:05 PM

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Answer 1

TheLittles

Level 10

207,173 points

Mar 17, 2026 5:45 PM in response to Gryphis23

"I dont want to turn off sleep mode on my computer.: I dont know how to adjust the signal so the projector doesnt interpret it as 'no input' and why this is different for my mac vs PC?"

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Power Loss:

When my Mac is sleeping, the projector is not powering off because each is powered off of the wall. Being plugged into the wall through HDMI would not carry power. So, it is probably a setting from within the projector. So, try preventing it from sleeping during a certain period of time, though use of Terminal. Mirror the screen, before it goes to sleep [command + F1], and then close the lid. See my User Tip: caffeinate - A Terminal Command to Temporarily Prevent your Mac from Sleeping - Apple Community

A Projector uses a Lamp, with can cost more than a grand in USD.

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