Take the 2-minute tour ×
Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

Let's just open and close this:

Is there a built in way to downmix all stereo output to mono on Mac OS X?

share|improve this question
Due to my low rep, I won't be able to self answer this until tomorrow. The answer is: macosx.com/forums/mac-os-x-system-mac-software/… –  nybergh Oct 20 '11 at 15:21
This seems appropriate here, but could also be appropriate over at Audio-Video production. Can an answer be linked without being moved? Mods? –  ObscureRobot Oct 20 '11 at 16:33
@Obscure Nope, not really possible –  slhck Oct 20 '11 at 18:00
add comment

2 Answers

up vote 4 down vote accepted

enter image description here

I tried modifying the setting in com.apple.universalaccess.plist, but couldn't get it to take effect:

sudo defaults write $f stereoAsMono -bool true
sudo chown $USER $f.plist

An AppleScript that toggles the preference:

tell application "System Preferences"
    reveal anchor "Hearing" of pane id "com.apple.preference.universalaccess"
end tell
tell application "System Events" to tell process "System Preferences"
    click checkbox 2 of tab group 1 of window 1
end tell
quit application "System Preferences"
share|improve this answer
add comment

Yes, there's an option to enable mono conversion under Universal Access.

System Preferences > Universal Access > Hearing > Play Stereo as Mono.

enter image description here

Found the answer here.

share|improve this answer
Ok after a page reload it turns out Lri apparently posted basically the same answer and then some. I'm going to accept his answer. –  nybergh Oct 21 '11 at 0:13
add comment

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.