[GH-ISSUE #1430] After installing MonitorControl 4.2 my Apple Led Cinema Display went darker #809

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opened 2026-05-05 06:44:01 -06:00 by gitea-mirror · 1 comment

gitea-mirror commented

2026-05-05 06:44:01 -06:00

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Originally created by @johandanielnilsson on GitHub (Sep 11, 2023).
Original GitHub issue: https://github.com/MonitorControl/MonitorControl/issues/1430

Before opening the issue, have you...?

Searched for existing issues
Read through the Monitor-Troubleshooting Wiki
Updated MonitorControl to the latest version (if applicable)

Describe the issue

After installing MonitorControl 4.2, the brightness level of my Apple Led Cinema Display was lowered. Can't find a way to get back the same light level as before the upgrade to 4.2. Have tried all possible settings in MonitorControl.

Estimated max brightness dropped by about 25%.

Expected behavior

A higher brightness in my Apple Led Cinema Display

Anything else?

No response

Environment Information (please complete the following information)

- macOS version: 13.5 Ventura
- Mac model: Mac Mini M2 Pro (2023)
- MonitorControl version: 4.2
- Monitor(s): Apple Led Cinema Display 27
- Monitor Cable(s)/Connection(s):Mac mini -> USB C to Mini DisplayPort Adapter -> Apple Led Cinema Display
- Apple Silicon/M1 (yes or no): yes

Originally created by @johandanielnilsson on GitHub (Sep 11, 2023). Original GitHub issue: https://github.com/MonitorControl/MonitorControl/issues/1430 ### Before opening the issue, have you...? - [X] Searched for existing issues - [X] Read through [the Monitor-Troubleshooting Wiki](https://github.com/MonitorControl/MonitorControl/wiki/Monitor-Troubleshooting) - [X] Updated MonitorControl to the latest version (if applicable) ### Describe the issue After installing MonitorControl 4.2, the brightness level of my Apple Led Cinema Display was lowered. Can't find a way to get back the same light level as before the upgrade to 4.2. Have tried all possible settings in MonitorControl. Estimated max brightness dropped by about 25%. ### Expected behavior A higher brightness in my Apple Led Cinema Display ### Anything else? _No response_ ### Environment Information (please complete the following information) ```markdown - macOS version: 13.5 Ventura - Mac model: Mac Mini M2 Pro (2023) - MonitorControl version: 4.2 - Monitor(s): Apple Led Cinema Display 27 - Monitor Cable(s)/Connection(s):Mac mini -> USB C to Mini DisplayPort Adapter -> Apple Led Cinema Display - Apple Silicon/M1 (yes or no): yes ```

gitea-mirror closed this issue

2026-05-05 06:44:03 -06:00

gitea-mirror commented

2026-05-05 06:44:05 -06:00

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@waydabber commented on GitHub (Sep 11, 2023):

Pls check the discussions, search for cinema display, there are several threads about this. You'll probably have to set the DDC range to 0-255 instead of 0-100.

@waydabber commented on GitHub (Sep 11, 2023): Pls check the discussions, search for cinema display, there are several threads about this. You'll probably have to set the DDC range to 0-255 instead of 0-100.