My external display (HP 27f 4k ) will not achieve full brightness when connected to my M1 MacBook Pro (2020, 13", Ventura 13.2) via the official Apple USB-C HDMI adapter . - The display's brightness is cranked all the way up - "*True Tone*" is off - "*Automatically adjust brightness*" is off - "*Slightly dim display on battery*" is off - I've recalibrated the display color, gamma, and white point (in macOS) and then restored it back to the factory default (because it made no difference to the brightness) I noticed this because I sometimes need to use a Windows laptop with this display. The monitor on Windows was noticeably brighter. So, I measured the brightness with a screen calibration tool and compared the results of the same monitor in the same location (all the same external variables) with the monitor plugged into my MacBook and then into a Windows laptop. I measured against a fullscreen browser window displaying a page with nothing but #FFFFFF (white) as the background color. Results: - 290 nits from the MacBook - 335 nits from the Windows laptop What's going on here? I suspect this is a software thing because I *think* I've seen the display snap from full brightness to this dimmed state after login. I say "think" because now that I've decided to write this post, I can't reproduce it. But my memory is that I'll log in, and seconds after the desktop is displayed, the brightness snaps to this dimmed state.

I understand the "Automatically Adjust Brightness" feature, when enabled, is designed automatically to raise or lower the brightness of e.g. the Macbook's screen depending on whether the surrounding environment is dark or well-lit. I am curious what sensor onboard the Macbook laptop is used to detect the amount of light in the room. A cursory experiment caused my Macbook's screen to dim when I covered the webcam, even though the webcan was not on, and the green light wasn't lit. Is the Macbook's webcam constantly sensing light levels? I was under the impression that the webcam was wired to prevent the webcam from capturing without illuminating the green LED. If there is some other sensor positioned close to the webcam just for sensing light levels, what is it?

When I remove the charging cable, the brightness of the screen is reduced to 50% from 100%. If I plug the cable back in, then it goes up to about 75%. It then drops again to 50% when I remove the cable. I would like to prevent the screen brightness from changing unless I change it manually with the screen brightness keys. What am I missing? I have the following configuration: - System Preferences > Battery > "Slightly dim the display while on battery power" is **off**. - System Preferences > Battery > "Turn display off after" is set to **never**. - System Preferences > Displays > "Automatically adjust brightness" is **off**. macOS Monterey 12.3 (21E230).

I have a MacBook Pro (14-inch, 2021) connected to an external monitor. I've disabled 'auto-brightness' but the screen keeps dimming by itself. I've tried setting it in my preferences both with and without the external monitor connected. Am I doing something wrong?

I like the MacBook's auto-brightness feature so I don't want to turn it off entirely but it's often a bit too dark for my liking. Is there a way to keep auto-brightness enabled but bump up the brightness it would normally pick in a given lighting condition? Maybe with terminal commands as it doesn't seem possible in settings UI.

I switched on and off the adaptive brightnes function. The brightness is set to maximum. But still, I hardly can see anything on the screen, as it is too dark. My GF's Android next to it is about double as bright. I realized it's really hot. Didn't do much with just sitting in the sun. Any ideas what I could try to get it brighter? Thanks

I recently noticed a problem with my computer.

and

brightness

stopped working. I tried everything: restart, hard restart, safe mode, system reset, creating a new user. All Mac components are **original** and have not changed. Computer: MacBook Pro 13" M1 8CPU|8GPU|16GB|1TB
Mac OS:

Sur 11.5.2

Battery:

%

That I see in settings:

As the title is self-descriptive, I'm looking for a macOS preference to automatically revert back the brightness level when the MacBook is plugged in as the preference "Slightly dim the display while on battery power" is checked for me that automatically dims the display brightness while on battery power. p.s. I'm using the latest stable version of macOS, macOS Monterey 12.0.1.

When using my old Thunderbolt monitor I loved that I could turn down the brightness from my Mac keyboard, but on the 2 new monitors I've bought recently, I can only turn down the brightness using their clunky on-monitor system. Are there any 3rd party monitors that: 1) Ideally can turn down the brightness via software controls on the Mac or 2) Have *Very* easy to use and accessible brightness buttons on them?

The option doesn't exist for my external monitor, even though I had it before the OS update when I had Catalina 10.15.7. The automatic brightness adjustment is driving me crazy. Can I disable it? Macbook Pro 2019 16" , Big Sur 11.2.1

Basically I'd like to have one brightness setting configured for when I'm plugged in through the adapter and charging the macbook from wall power, vs a lower brightness setting when I'm running off battery to preserve battery life. This configuration swap would be in response to the changed power state of the laptop. Does MacOS support such behavior?

Apple seems to have completely removed the automatic brightness switch in recent iOS versions - the only 'automatic' settings now are for light/dark mode & Night Shift. I don't mind Night Shift changing my screen's white point as night comes on, but in regular daylight I heartily object to it constantly deciding for me how bright the backlight should be. I'm reading my book, it feels a bit dim for the ambient light I'm in, so I quickly dial the brightness up a bit…. then as I'm reading I can see the system just overruling me & turning it back down again. So I turn it up… the system turns it down. Rinse & repeat ad nauseum. I really do feel it's something I ought to be in charge of. Does anyone know the magic dance necessary to stop it doing this? Picture of settings just in case I missed something really *really* obvious.

I have problem with set up auto brightness. Everything was fine until I didn't pushed brightness button on keyboard. Now system report says that auto brightness settings are not working but in Preferences everything is set up correctly. Of course, my auto brightness settings are working fine. But why system report says that it is not? I have also tried to reset SMC NVRAM and PRAM but it is not working.

I use the automatic display brightness function in the System Preferences and I have noticed that it is doing totally wrong. When I turn the feature off and set the brightness to let‘s say maximum and turn the feature on again, the maximum will be used as the standard lighting. So when I set the maximum in a dark room, it will stay this bright. I tired it with 90 % brightness. When I open my windows to let light into the room, it goes up to 100 % and by closing the windows to a totally dark room it‘s going back to the 90 %. And sometimes when I set it to like 10 %, the iMac doesn‘t even react to my flash light. After a little time of tweaking around it works again. I have restarted the iMac a couple of times, but it didn‘t help at all. How can I fix that stupid behavior? My iPhone does fine. It uses the real ambient lighting. What i did is to cover the sensor, set the brightness to as low as possible and activate automation. Putting the hand away set it to an optimal level. Is this how it‘s done? – iMac Late 2015 27" (Mojave up-to-date, freshly installed a week ago) – iPhone 8 Plus (iOS up-to-date)

- I have unchecked Auto-Brightness under Settings app → General → Accessibility → Display Accommodations. - I have also disabled Night Shift under Settings app → Display & Brightness. - I have Low Power Mode turned off under Settings app → Battery. However, every time I use the iPhone for either more than 5 minutes or use any apps, the brightness automatically dims down. It’s frustrating since I play games and use apps all the time. The brightness keeps fluctuating. As I understand, there are no hardware faults. I believe this is purely a software bug. I would really like some help. I am using an iPhone 7 running iOS 12.3.1.

As the title states. I'm using [OSDisplay](https://github.com/zulu-entertainment/OSDisplay) (as a sort of answer to my question [here](https://apple.stackexchange.com/questions/245882/is-there-a-way-to-display-an-instance-of-bezelui-brightness-hud-volume-hud-us/321096#321096)) . I've noticed that in Sierra (or so it seems), the OS's icon for the brightness HUD changed some—longer and thinner rays, thinner inner circle, etc. I would like to change the file that OSDisplay uses so that it matches the default icon. Apparently in the past these images were stored as PDF files in /System/Library/LoginPlugins/BezelServices.loginPlugin/Contents/Resources/BelzelUI/HiDPI, but I do not see them there any more. The Contents/Resources/ folder just contains a bunch of .lproj folders.

Is there an app for the menu bar that would allow me to enable/disable the: "automatically adjust brightness" setting? I've searched and all I've found is an app that changes the actual brightness levels, but that's useless as it exists as a shortcut on the keyboard.

Whenever I restart my iPhone, the brightness gets set to the lowest, so it is very dim. Then I have to adjust it back to around the middle, where I like it. How do I stop this from happening? I turn off my iPhone by holding the power button, then slide to turn off, then press and hold power button to turn on. I have auto-brightness disabled. I'm using an iPhone 6 with iOS 11.2.5.

One of the best features of my iPhone 7 Plus was the way it could be configured to auto-dim the display, which not only helped the phone's lighting to match the mood, but was also appreciated by people around me in dim environments (trains, planes, cozy cafes, etc.): My iPhone X adds a neat feature that adjusts the tone of the display to ambient lighting to keep it consistent, but this does not (at least not sufficiently) adjust the brightness: As a result, the phone is always far too bright in dim environments (and often just a tad to dim in bright ones). In my experience with macOS, there tend to be advanced or hidden settings preserved for features that Apple has removed from the UI. Is this the case with Auto-Brightness? Is there some way to get the auto dimming behavior back on my iPhone X?