ADC Display and Mavericks compatibility

I have 2 23"ADC displays connected to my 2009 Mac Pro. I can boot into 10.8, set the brightness, boot back into 10.9 and the settings persist. If the system is resetting your brightness, try unplugging the USB cable coming from the ADC-DVI converter until after the system has booted.

I was able to solve this problem.

I got the following .kext files from a computer running mountain lion.

AppleBackligt.kext

AppleBacklightExpert.kext

AppleUSBDisplays.kext

The files are placed in /System/Extensions

Then i placed the kextfiles on the desktop, and ran a tool called "KextBeast". This app installs every kext file on the desktop. Then i rebooted and voilá..

1. Get kext files

2. Run KextBeast

3. Reboot

//ap

Please note that after you've installed the kext files restart may take VERY long.

DO NOT POWER OFF YOUR MAC WHILE IT'S RESTARTING.

Thanks for the pointer.

I backed up the 3 extensions from my 10.9 /System/Library/Extensions and replaced them ones from 10.8 manually. Just make sure the permissions are correct and you don't have to bother with that GUI utility. The 10.8 extensions are also codesigned, so 10.9 doesn't complain when it loads them up. I didn't notice any particular delay after rebooting and the brightness functionality has been restored.

I can confirm that this solution brought back the missing functionality - thanks a lot for sharing this information. To whom it may concern: the first time I tried this hack, BOTH monitors lacked the brightness slider, even after copying back the original 10.9 ktext files! It turned out that I had to delete the boot caches (used the "Onyx"-software for this) and the PRAM to get it going.

Now lets hope that we don't need to repeat this fix every minor update.

For those that don't have a computer with Mountain Lion at hand, where can we get those 3 kexts?

Mac Pro 2009 running on Mavericks with a very dim Apple Cinema Display HD 23" acrylic.

Thanks!

Emanuele

I replaced all 3 kexts but only one kext has changed its version number the other two have not altered from 10.8.5 to 10.9.2.

Remove the 2.8 version of AppleUSBDisplays.kext and replace with 2.7.2 which can be extracted from 10.8.5 combo update using Pacifist.

Wish I had known -- I have a 20" ADC Cinema.

My brightness controls work, however.

But every time I unplug the Cinema my MBP (2010) reboots automatically (and then tells me I shut down improperly).

I did 3 upgrade installation from 10.8 to Mavericks, and then did a clean installation--still does not work.

Guess I'll figure out a way to shut down each time before unplugging the Cinema.

Thanks man, that did the trick. BTW, I used my Time Machine backups from 2013, I didn't even have to fiddle with the permissions. It kind of irritates me that this one caught me off guard. Something similar happened a few years ago with AppleUSBAudio.kext.

All my problems with my 20" ADC Cinema were a result of an outdated (non Mavericks) driver for my Hawking wireless card/extender.

They sent me a link for an updated driver: http://hawkingtech.com/products/downloadfile/1039.html