Tag archives: sleep slider

Get Back the System Sleep Preferences in Mac OS X

I recently purchased a Mac Pro (late 2013) and discovered that the Energy Saver Pane is a little different; most notably, the Computer Sleep slider is missing. Here is how to get it back.

First, use the following terminal commands to determine the model and board ID of your computer:

sysctl hw.model | awk '{ print $2 }'
ioreg -l | awk -F\" '/board-id/ { print $4 }'

Second, navigate to the following folder:

cd /System/Library/Extensions/IOPlatformPluginFamily.kext/Contents/PlugIns/X86PlatformPlugin.kext/Contents/Resources/

Third, determine the .plist file that corresponds to the model and board ID of your computer; e.g., Mac-F60DEB81FF30ACF6.plist.

Fourth, modify the file that corresponds to the model and board ID of your computer:

sudo vi /System/Library/Extensions/IOPlatformPluginFamily.kext/Contents/PlugIns/X86PlatformPlugin.kext/Contents/Resources/Mac-UDID.plist

Fifth, change the following line:

UnifiedSleepSliderPref

to

UnifiedSleepSliderPref

Sixth, regenerate kext cache by “touching” the Extensions directory:

sudo touch /System/Library/Extensions

Finally, wait a minute just to make sure the system has enough time to finish regenerating the kext cache. Then, reboot your mac.

Alas, you will once again have the two-slider pane.

System Energy Dual Preferences