[GH-ISSUE #1699] App quits when changing main display's (Mac) brightness #943

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opened 2026-05-05 06:55:11 -06:00 by gitea-mirror · 1 comment

gitea-mirror commented

2026-05-05 06:55:11 -06:00

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Originally created by @allen-liaoo on GitHub (Dec 13, 2024).
Original GitHub issue: https://github.com/MonitorControl/MonitorControl/issues/1699

Before opening the issue, have you...?

Searched for existing issues
Looked through the wiki
Updated MonitorControl to the latest version (if applicable)

Describe the bug

When plugged into am external display and I try to change my Mac's own display's brightness, the app quits immediately. It has no problem changing the external display's brightness, whether it is software-controlled or DDC. If no external; display is connected, the problem doesn't occur. "Screen to control" setting doesn't change the bugged behavior either.

Steps to reproduce

Connect an external display
Change Mac's display brightness
See that the app quits

Expected behavior

The app should remain open

Anything else?

No response

Environment Information (please complete the following information)

- macOS version: Sequoia 15.1.1
- Mac model: M1, 2020
- MonitorControl version: 4.2.0 Build 7048
- Monitor(s): Color LCD (Mac's display), DELL P2213
- Apple Silicon/M1 (yes or no): yes

Originally created by @allen-liaoo on GitHub (Dec 13, 2024). Original GitHub issue: https://github.com/MonitorControl/MonitorControl/issues/1699 ### Before opening the issue, have you...? - [X] Searched for existing issues - [X] Looked through [the wiki](https://github.com/MonitorControl/MonitorControl/wiki) - [X] Updated MonitorControl to the latest version (if applicable) ### Describe the bug When plugged into am external display and I try to change my Mac's own display's brightness, the app quits immediately. It has no problem changing the external display's brightness, whether it is software-controlled or DDC. If no external; display is connected, the problem doesn't occur. "Screen to control" setting doesn't change the bugged behavior either. ### Steps to reproduce 1. Connect an external display 2. Change Mac's display brightness 3. See that the app quits ### Expected behavior The app should remain open ### Anything else? _No response_ ### Environment Information (please complete the following information) ```markdown - macOS version: Sequoia 15.1.1 - Mac model: M1, 2020 - MonitorControl version: 4.2.0 Build 7048 - Monitor(s): Color LCD (Mac's display), DELL P2213 - Apple Silicon/M1 (yes or no): yes ```

gitea-mirror closed this issue

2026-05-05 06:55:13 -06:00

gitea-mirror commented

2026-05-05 06:55:15 -06:00

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Owner

@waydabber commented on GitHub (Dec 13, 2024):

You need to upgrade to the latest version (auto update won't work on 4.2.0).

@waydabber commented on GitHub (Dec 13, 2024): You need to upgrade to the latest version (auto update won't work on 4.2.0).