Keynote cuts in and out during presentation

I have been using my MacBook Pro with a Panasonic projector for over a year without a problem I use an hdmi adapter to usbc for the connection. As of last month the keynote presentation suddenly goes to a black screen and then returns to the presentation at the beginning of the slide that was on the screen when the cut out occurred. If it was a video segment it starts at the beginning and replays the video.It happens inexplicably two or three times over the one hour presentation. I have tried to replicate the problem by wiggling the cords and adapter to no avail.This only occurs when I am presenting through the projector. I have the updated Keynote. This began after I updated to Big Sur if that has any correlation. Any suggestions would be gratefully received.

MacBook Pro, OS X 10.11

Posted on Dec 29, 2020 10:07 AM

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Posted on Dec 30, 2020 6:17 AM

We use Amphetamine from the Apple App Store on all our Macs that are used for projection:

https://apps.apple.com/us/app/amphetamine/id937984704?mt=12


This is Apples sleep seeing webpage: https://support.apple.com/en-gb/guide/mac-help/mchle41a6ccd/mac

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Dec 30, 2020 6:17 AM in response to GARY LAPIETRA

We use Amphetamine from the Apple App Store on all our Macs that are used for projection:

https://apps.apple.com/us/app/amphetamine/id937984704?mt=12


This is Apples sleep seeing webpage: https://support.apple.com/en-gb/guide/mac-help/mchle41a6ccd/mac

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Keynote cuts in and out during presentation

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