[GH-ISSUE #1736] App crashes on changing brightness on MacBook with monitor connected via USB-C #959

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opened 2026-05-05 06:56:07 -06:00 by gitea-mirror · 2 comments

gitea-mirror commented

2026-05-05 06:56:07 -06:00

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Originally created by @DenisK-Voodoo on GitHub (Mar 10, 2025).
Original GitHub issue: https://github.com/MonitorControl/MonitorControl/issues/1736

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

App works fine on changing brightness of external monitor.
Once I'm trying to change brightness of MacBook it connected (both with slider or keyboard) app quits momentarily.

Steps to reproduce

Connect monitor via USB-C with charging (not a Thunderbolt).
Launch the MonitorControl.
Try to change the brightness of Color LCD (MacBook display).
App quits momentarily.

Expected behavior

App should not crash on changing brightness.

Anything else?

No response

Environment Information (please complete the following information)

- macOS version: Sequoia 15.3.1
- Mac model: MacBook Pro 2021
- MonitorControl version: 4.2.0
- Monitor(s): LG UltraWide 38WR85QC-W
- Apple Silicon/M1 (yes or no): yes (M1 Max)

Originally created by @DenisK-Voodoo on GitHub (Mar 10, 2025). Original GitHub issue: https://github.com/MonitorControl/MonitorControl/issues/1736 ### 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 App works fine on changing brightness of external monitor. Once I'm trying to change brightness of MacBook it connected (both with slider or keyboard) app quits momentarily. ### Steps to reproduce 1. Connect monitor via USB-C with charging (not a Thunderbolt). 2. Launch the MonitorControl. 3. Try to change the brightness of Color LCD (MacBook display). 4. App quits momentarily. ### Expected behavior App should not crash on changing brightness. ### Anything else? _No response_ ### Environment Information (please complete the following information) ```markdown - macOS version: Sequoia 15.3.1 - Mac model: MacBook Pro 2021 - MonitorControl version: 4.2.0 - Monitor(s): LG UltraWide 38WR85QC-W - Apple Silicon/M1 (yes or no): yes (M1 Max) ```

gitea-mirror closed this issue

2026-05-05 06:56:09 -06:00

gitea-mirror commented

2026-05-05 06:56:13 -06:00

Author

Owner

@waydabber commented on GitHub (Mar 10, 2025):

Hi there, you need to upgrade to the latest v4.3.3 version.

@waydabber commented on GitHub (Mar 10, 2025): Hi there, you need to upgrade to the latest v4.3.3 version.

gitea-mirror commented

2026-05-05 06:56:16 -06:00

Author

Owner

@DenisK-Voodoo commented on GitHub (Mar 11, 2025):

Thanks, it helped! It was just inconvenient that app itself was saying that it is up to date.

@DenisK-Voodoo commented on GitHub (Mar 11, 2025): Thanks, it helped! It was just inconvenient that app itself was saying that it is up to date. ![Image](https://github.com/user-attachments/assets/ade79697-f226-451d-a0e5-3a0a33eb8241)

gitea-mirror referenced this issue

2026-05-05 07:08:15 -06:00

[PR #959] [MERGED] Added Czech translation #1224