1
vote
0answers
27 views

Automatically adjust brightness on second monitor

I am using a Late 2013 21.5" iMac with a 22" Samsung TV as a second monitor. My iMac automatically changes its brightness throughout the day. Is there any way I can get my Samsung TV to automatically ...
0
votes
0answers
99 views

iMAC 20-inch - Early 2008 - Brightness automatically dims, no settings to prevent this

My display automatically dims itself after a while and it's really annoying. Of course I tried to search for a solution, but I've got no options like the answers say. They mention "Energy Saver", and ...
0
votes
0answers
269 views

iMac OS X 10.9 screen brightness shortcuts (F14, F15) fail and just beep, Why?

OS 10.9 screen brightness shortcuts (F14, F15) fail and just beep. It seems to be related to when my iPad Apple Bluetooth keyboard is (accidentally) connected to the iMac while using the Apple wired ...
1
vote
0answers
259 views

How to control brightness on external late 2009 iMac monitor when connected to new 2012 iMac primary monitor?

I have a late 2012 27" iMac as my primary monitor also connected to a late 2009 27" iMac as a secondary monitor via a mini-display port to mini-display port cable. I also have a Dell 24" monitor ...
3
votes
1answer
4k views

iMac display — can't change screen brightness on bootcamp with Windows 7

I can't change iMac (2011) display brightness on bootcamp with Windows 7. When I press F1 it shows icon and even fill the bar, but nothing happen to display. What have I tried: Reinstalling support ...
4
votes
2answers
2k views

Turning off ambient light control?

I have a mid-2011 27" iMac. I have realized that the screen brightness adjusts depending on the ambient light. When the sun hides behind the clouds, and the room gets darker, the brightness decreases. ...
2
votes
1answer
2k views

How do I make my external Thunderbolt 27" display's brightness match my iMac's brightness?

I'm running my 27" iMac with a 27" Thunderbolt display, and I'm having trouble getting their brightnesses to match. It seems like checking "Automatically adjust brightness" on both causes different ...
2
votes
4answers
2k views

Is there an application for Windows7 (in bootcamp) to adjust the level of brightness of screen of iMac?

I want to darken the screen of my iMac because it is too bright for me. I use an application called shades, but it doesn't work in bootcamp. I found the software for Windows Vista called VistaShades ...