[GH-ISSUE #897] After Monterey upgrade: 100% Brightness is actual 50% #560

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opened 2026-05-05 06:15:07 -06:00 by gitea-mirror · 3 comments

gitea-mirror commented

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

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Originally created by @mattefabb on GitHub (Jan 17, 2022).
Original GitHub issue: https://github.com/MonitorControl/MonitorControl/issues/897

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

MonitorControl perfectly worked until the Monterey OS upgrade: the second after the Brightness was real 100% of the external monito (Apple Cinema LED), but when I tried to scroll the brightness > it went 50% and is still at it (MonitorControl think it's 100%).
I'm on a M1 Macbook Pro.

Steps to reproduce

1 Upgrade to Monterey
2 Try to adjust Brightness
3 Try to bring it back to 100%

Expected behavior

Expected to come back to 100%, at 100% of setting

Anything else?

No response

Environment Information (please complete the following information)

- macOS version: Monterey
- Mac model: M1
- MonitorControl version: Latest
- Monitor(s): Apple Cinema LED
- Apple Silicon/M1 (yes or no): yes

Originally created by @mattefabb on GitHub (Jan 17, 2022). Original GitHub issue: https://github.com/MonitorControl/MonitorControl/issues/897 ### 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 MonitorControl perfectly worked until the Monterey OS upgrade: the second after the Brightness was real 100% of the external monito (Apple Cinema LED), but when I tried to scroll the brightness > it went 50% and is still at it (MonitorControl think it's 100%). I'm on a M1 Macbook Pro. ### Steps to reproduce 1 Upgrade to Monterey 2 Try to adjust Brightness 3 Try to bring it back to 100% ### Expected behavior Expected to come back to 100%, at 100% of setting ### Anything else? _No response_ ### Environment Information (please complete the following information) ```markdown - macOS version: Monterey - Mac model: M1 - MonitorControl version: Latest - Monitor(s): Apple Cinema LED - Apple Silicon/M1 (yes or no): yes ```

gitea-mirror

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

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gitea-mirror commented

2026-05-05 06:15:13 -06:00

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@mattefabb commented on GitHub (Jan 17, 2022):

Update: Lunar can do the trick, in addition of MonitorControl I installed Lunar pro (trial) and it was able to bring bag the Brightness to real 100%, but MonitorControl keep doing the bug: if I try to adjust its 100% Brightness bring back the monitor to ist 50% actual Brightness and I need Lunar to bring it back to 100%... I hope MonitorControl will fix it, or I will be forced to purchase Lunar Pro for the future.

@mattefabb commented on GitHub (Jan 17, 2022): Update: Lunar can do the trick, in addition of MonitorControl I installed Lunar pro (trial) and it was able to bring bag the Brightness to real 100%, but MonitorControl keep doing the bug: if I try to adjust its 100% Brightness bring back the monitor to ist 50% actual Brightness and I need Lunar to bring it back to 100%... I hope MonitorControl will fix it, or I will be forced to purchase Lunar Pro for the future.

gitea-mirror commented

2026-05-05 06:15:16 -06:00

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@the0neyouseek commented on GitHub (Jan 17, 2022):

@mattefabb Please have a look here https://github.com/MonitorControl/MonitorControl/discussions/739 and tell me if it fixes your issue

@the0neyouseek commented on GitHub (Jan 17, 2022): @mattefabb Please have a look here https://github.com/MonitorControl/MonitorControl/discussions/739 and tell me if it fixes your issue

gitea-mirror commented

2026-05-05 06:15:20 -06:00

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@waydabber commented on GitHub (Jan 24, 2022):

We should investigate this issue but a bit difficult without an actual display like this. I guess we should wait for somebody with the expertise and the hardware hands-on to figure out what is wrong.

Btw, Lunar is a great product I'd say go for it if it fixes the issue for you! @alin23 :)

@waydabber commented on GitHub (Jan 24, 2022): We should investigate this issue but a bit difficult without an actual display like this. I guess we should wait for somebody with the expertise and the hardware hands-on to figure out what is wrong. Btw, Lunar is a great product I'd say go for it if it fixes the issue for you! @alin23 :)