In the accessibility settings on Yosemite I have enabled the "Reduce Transparency" setting multiple times. The reason I am turning it off is to try to fix the issues causes with the menu redrawing when multiple monitors are connect and eventually slowing down the machine to a crawl. Each time I turn it on and go back in and check it has turned itself off.

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It seems to turn itself off if the external monitor is connected.

Why does this setting not work?

1 Answer 1


The symptoms you describe are likely caused by the preference not getting saved to disk. This is caused by a problem with the file permissions, or if the preference file somehow got corrupted.

If this is the case, you can move the preference file (I think the relevant one is ~/Library/Preferences/com.apple.universalaccess.plist) from its location: this will cause the preference file to be recreated.

Of course this will work also for other preferences (though identifying the correct file isn't always as easy); remember to keep the file around (instead of deleting it) so you can restore it in case this fix doesn't work.

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