OSD slider not displayed on MacOS Tahoe + FIX #1873

Note: the latest pre-release version of BetterDisplay has a proper solution for this, I recommend using that application. MonitorControl v4.x will probably not have this fixed (it's a fundamental issue, the native OSD framework does not provide this functionality on Tahoe).

Thanks, useful answer!

i second this issue. unfortunate! maybe apple will fix it on their side?
i do not want to change app, i changed from betterdsiplay to monitorcontrol for a reason.

I am working on a version of MonitorControl derived from BetterDisplay with the same feature-set as MonitorControl for a simplified experience. It's not going super fast and I don't have an ETA but eventually the replacement app should solve this issue. Obviously the UI and everything will resemble BetterDisplay (which can be good or bad news, depending on which app UI you prefer :)), just with the limited functionality of MonitorControl.

great to hear! cool! betterdisplay is not fully free and does/wants too much. thanks for working on a better monitorcontrol ;)

I must admit I was a bit reluctant about switching apps as well as I only need to be able to adjust non-Apple displays brightness with the keyboard, but man BetterDisplay is something! You can dial it down as much as you want to only have a brightness slider, or even without a menu item and just the Tahoe native-looking OSD when using keyboard, or you can go to town and explore the rabbit hole of DDC.

While I can see how the powerful capabilities and licensing may scare people, BetterDisplay is a power user's dream. Awesome work @waydabber!

I believe there's still value in offering a dead simple brightness adjustment app such as MonitorControl, especially for non-technical folks though and I'll be monitoring. In the meantime, I'm more than happy with BetterDisplay and will likely continue using it :)

yes i tried it too and concur! amazing BUT super complex and way too much for normal users (monitorcontrol fit that bill). so glad it will live on in a 'lite' version too.

Hey @waydabber, I hope you are well. I wonder if you found some time to fix this issue in MonitorControl? Thanks in advance.

Yeah, sorry for the lack of progress. Did not gave up creating a MonitorControl variant from BetterDisplay, it's just that I have other coding (and other non-coding) stuff to do as well. I should give this a bit more priority, I know. Stripping BD of all things not needed in MC in a way that things remain neat and sustainable is a more serious undertaking than I originally thought, requiring a lot of careful refactoring. I'll post a build when I have something to share (might take a while though). :)

First, thank you for creating such a great app. I think I'm encountering similar behavior mentioned above so I didn't want to create a new issue but just provide more info. The function keys for increasing/decreasing brightness and volume all work for me as do the controls in the panel, but the small display that indicates the changes I am making to either brightness or volume pops up but does not indicate anything, either current level or the changes being made. I'm attaching two screen shots. The first shows the panel working properly from the menu bar, the second shows an empty "slider." This is the one not working. And I should point out that it works on the native MacBook screen without attached monitor. The problem is only happing on the attached monitor.
Hardware: MacBook Pro (M1), Tahoe 26.1, Asus PA27JCV monitor , USB-C connection.

Could this somehow also be related to #1831 ?

Adding in: this is all sliders, not just brightness. Audio, too. Would love to see a fix for this but it's a quality of life issue, not a functionality issue.

Yes, this is crucial for audio! This is my main use case

Upgraded to 26.3 few minutes ago and same behaviour: No OSD slider action for sound volume and brightness visible.

Just confirming this is still an issue.

Still an issue :sad:

Yes, this is an issue. I was working on a MonitorControl version derived from BetterDisplay, got halfway done but then started working on a major refactor + adding some new features for BetterDisplay and that halfway-done MonitorControl version got outdated, especially as Apple introduced various changes in macOS as well that further affected the UI.

Maybe a simple/elegant solution would be just to provide an importable configuration file for BetterDisplay that removes all unneeded stuff from the app menu to make things streamlined (hide all stuff that is not in MonitorControl or would require Pro alongside the Get Pro badge in the app menu which I understand annoys some people who just wants a MonitorControl replacement for Tahoe). App Settings would of course still remain somewhat complex compared to MonitorControl, but most people don't go there regularly.

I forked the code and fixed this issue. If you need it, you can install the one I specifically adapted for macOS 10.6.

https://github.com/likaia/MonitorControl/releases/tag/v1.1.0

@waydabber @joaqo @hcguersoy @wsalame @SRANCO @MotoTimL @bkarakashev @waydabber

I certainly encourage forking or experimenting with this.

• There is the fork of @likaia (although I am not sure whether using the same name and a random new version number is a good idea, see my take on this here: macOS 26 compatibility notes and reference implementation #1856 (comment))
• Also there is a PR that aims to address this by @arsarsars1 (although it's a bit unfinished) - Fix UI display issues and improve macOS Tahoe/Sequoia support #1827

I certainly encourage forking or experimenting with this.

• There is the fork of @likaia (although I am not sure whether using the same name and a random new version number is a good idea, see my take on this here: macOS 26 compatibility notes and reference implementation #1856 (comment))
• Also there is a PR that aims to address this by @arsarsars1 (although it's a bit unfinished) - Fix UI display issues and improve macOS Tahoe/Sequoia support #1827

Hmm, you're right, the same name does cause ambiguity. I've changed it to a new name: LumaGlass.

I will resolve the issues in the PR today. It should be ready to merge soon. @waydabber.

a (dumb) workaround i didn't see mentioned yet -- defaults write com.apple.controlcenter EnableSystemBanners -bool false sets sequoia style OSD globally, for anyone else like me that preferred it anyways

For macOS Golden Gate 27 there is now a way to access the native Control Center UI, so I'll probably add that as an option (I added this as an option for BetterDisplay v5.x on macOS 27 as well).

For Tahoe the workaround is probably acceptable, at least if the other alternative is adding and managing an entirely custom HUD trying hard to replicate the native look&feel. I did this for BetterDisplay but that requires constant tweaking and follow-up (there are slight differences still) as Apple does tweak the native appearance from time-to-time.