The standard method should allow either display based on focus to be controlled independently. Jan 1, PM in response to ckahn In response to ckahn. You can try re-installing BC drivers.Īlso, check in Services if you have a AppleControlPanel. But back in Windows 10 F1 and F2 only work on the iMac display. F1 and F2 change brightness on the display that mouser cursor is positioned on. I booted back into MacOS and everything seems fine there. Make sure you have administrative privileges and try again. You may not have privileges to change the startup disk. No, F1 and F2 brightness keys only change the brightness on the iMac display wherever the cursor happens to be.Īlso the Change brightness slider in the Windows Display settings are greyed out and un-slide-able. Jan 1, AM in response to ckahn In response to ckahn. How do I control brightness for this secondary screen? It's a bit bright at the moment. Connected a Thunderbolt Display as a second screen. To start the conversation again, simply ask a new question.
