Mac mini running macOS Sequoia 15.5 experiencing brief 2 second blackouts

I have a 2020 Mac Mini running Sequoia 15.5 and use an Asus 4K display which functions perfectly. I just started experiencing brief 2 second blackouts and never experienced this previously. The only change I've made is the addition of the Zoom app, though it doesn't run in the background nor is it launched during bootup. If I restart, it seems to be OK. Is anyone else noticing this? I'm going to uninstall Zoom to see if it makes any difference. Thanks

[Re-Titled by Moderator]

Original Title: Periodic short display blackouts with 15.5

Posted on Jun 22, 2025 4:38 PM

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jontalk1 Author

Level 1

29 points

Posted on Jun 24, 2025 11:19 AM

I appreciate the reply and info..I've reported the issue to Apple and after researching found countless reports about Zoom running in the background, causing problems with displays etc. The HDMI cable in use is brand new, so I uninstalled Zoom since its not immediately needed. Since the problem hasn't shown up again, I have to think it was due to the app running in the background and the possibility its doesn't play well with Sequoia 15.5

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jontalk1 Author

Level 1

29 points

Jun 27, 2025 12:02 PM in response to Old Toad

Good to hear..I'm not sure what causes the winking at this point. I had an Asus Pro Art FHD display before this one and never noticed it. That said, I wanted to try using the AI app Grammarly this week but after installing decided against it. Due to how it installs, when its sent to trash it left behind files, so I just ran Disk Doctor..regardless am keeping my fingers crossed the winking won't be a problem with the shorter HDMI cable

Owl-53

Level 10

102,223 points

Jun 23, 2025 5:15 AM in response to Owl-53

Self correction and should read

" I came with their HDMI Cable for connecting to a M4 Mac Mini "

den.thed

Level 10

90,718 points

Jun 23, 2025 10:17 AM in response to jontalk1

You're welcome. Please let use know if that helps.

Old Toad

Level 10

215,196 points

Jun 24, 2025 11:40 AM in response to jontalk1

Thanks for the feed back. I have Zoom installed but haven't used it in a couple of years. I'll try uninstalling it and see if the makes any difference.

Old Toad

Level 10

215,196 points

Jun 27, 2025 10:44 AM in response to jontalk1

No blackouts as of 10:43 am today.

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Mac mini running macOS Sequoia 15.5 experiencing brief 2 second blackouts