![]() ![]() Hi everyone, I bought an Apple Led Cinema Display 24', used but in very good condition. I already installed the display software/drivers and attached the cinema displays USB cable to my iMac. The cinema display stays at full brightness. When pressing F1 & F2 to control the brightness, only the iMacs brightness changes. Please let me know if this fix also works for you too. No brightness control Led Cinema Display 24' El Capitan. Ive got a 27' iMac and a 27' cinema display. This is somewhat difficult, because you can barely see the screen, but it is doable and works every single time. And I have all auto-brightness settings turned off, and the non-Mac function keys option also is turned off, as discussed below.Īll that said, the solution for me is to simply run the Systems Settings app, then go to Display, and then manually drag the brightness setting bar, which is close to nothing/zero, back to your desired normal brightness setting (mine is 100%). User profile for user: PeterJiangWang PeterJiangWang Author. ![]() ![]() To start the conversation again, simply ask a new question. Browse Search Sign in Sign in Sign in corporate Peripherals / Cinema Displays Looks like no one’s replied in a while. And, like you, the F1 and F2 keys no longer can control and fix the brightness (and they used to in Monterey). Local Nav Open Menu Local Nav Close Menu. However it now does so intermittently, sometimes overnight (i.e., I wake up and my Mac's screen is at close to zero brightness). In Windows on your Mac, do one of the following: Use Windows: Click the Start button, choose Settings, then click System. My iMac did not have the dimming problem when I first installed Ventura. I had a similar problem, occasionally, but have a solution that always works, at least for me. This should resolve the issue. It happened to me twice in the last couple of months when power crashed (or my UPS tripped). Resolution: (1) Unplug both monitors and the Mac Studio computer for at least five or more minutes. (2) Next, plug in ONLY the dim display and let it start. There is no on/off switch on the monitors, so plugging in the monitor will cause it to start and go dark when done. Three dots will be visible for a short time in the middle of the screen as it starts. (3) Next, plug in the other monitor and the computer unit. Start all three devices. It appears this will force the system to recognize the correct firmware for the monitor (or force a firmware update). Troubleshooting: Restarting the system does not fix the issue. When checking the About This Mac> System Report> Graphics/Displays, the dim monitor fails to show the Display Firmware Version. The good monitor shows Display Firmware Version: Version 15.5 (Build 19F77). Mac Studio Display Brightness Control Not Working Apple Studio Display (2 monitors) connected to Mac Studio (2022) with Apple M1 Ultra chip running macOS Monterey (12.4).Īfter a power failure, one of the Mac Studio Display monitors is visibly dimmer than the other. Settings>Displays does not show any brightness adjustment for the dim monitor. ![]()
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