The cinema display is much darker than my imac's display, I can't seem to match them up. The brightness control only controls the imac.
Anybody know how to adjust this?
Thanks in advance.
I'm running mountain lion.
iMac, Mac OS X (10.7.4)
There should be a brightness slider in Displays system preference for each display.
No, it only shows the slider for the main screen.
If it's the non-Thunderbolt version, make sure its USB cable is plugged into the computer.
I'm going to try that now, but that means I lose a usb port, one of the reasons I bought this display is to have the extra usb ports. Mine are all used on the imac.
I now have the brightness bar for the 2nd monitor but I've lost a usb port so I don't consider this as having solved the problem.
Thanks for the info, at least I'm able to make it much brighter.
There are two USB ports on the back of the display.
I know but I was counting on having the three, I now had to give up one on the imac. I hope there is a fix for this coming soon. I really appreciate your help though, I'm glad that I was able to get the brightness setting bar for the 2nd display.
The USB ports on the display won't work if the display's USB cable isn't plugged into the computer, so it's not just for brightness control. The USB connection is also used for the display's camera. The Thunderbolt version of the display doesn't use any of the computer's USB ports, but it requires a computer with a Thunderbolt port.
There is not going to be any fix for this. It's working as designed. If you have a wired Apple keyboard you can use its two USB ports for devices that don't need much USB power. If you need extra USB ports you will need a USB hub. You could free USB ports by using other ways of connecting some devices. For example:
Bluetooth instead of wired keyboard and mouse.
WiFi printer.
FireWire cases for USB disk drives. (FW800 is faster than USB.)
I didn't realize that this is how it's designed. I have to say that I'm not as satisfied as I thought I would be, it's a nice display/monitor but I'm not surre if it's worth $1000.
I've been debating weather to purchase this display for over 2 weeks now.
If your iMac has Thunderbolt you could swap the display for the Thunderbolt version. Any non-Thunderbolt display with USB ports has to use one of the computer's ports, but there might be some non-Apple displays with more than two USB ports.
Vingo, thank you for asking this question. I just got a 27" LED Cinema Display and couldn't figure out how to adjust the brightness. Nowhere in the instruction manual does it mention that the USB has to be plugged into my iMac in order to adjust brightness. I also don't recall seeing anything about that on the Apple Store site. Seems a little misleading.
Malcolm, thank you for the fix.
Beautiful display. Kinda shady non-disclosure about the loss of usb to adjust brightness issue.
Just get a USB hub, they are probably like $5 nowadays...
Just purchased a 27 inch cinema display
