diff --git a/.osx b/.osx
index 1fdd464..8df4406 100755
--- a/.osx
+++ b/.osx
@@ -274,6 +274,9 @@ defaults write com.apple.dock dashboard-in-overlay -bool true
 # Make Dock icons of hidden applications translucent
 defaults write com.apple.dock showhidden -bool true
 
+# Enable the 'reduce transparency' option on Yosemite. Save GPU cycles.
+defaults write com.apple.universalaccess reduceTransparency -bool true
+
 # Add iOS Simulator to Applications folder.
 sudo ln -sf /Applications/Xcode.app/Contents/Applications/iPhone\ Simulator.app /Applications/iOS\ Simulator.app