2006-12-25

Mac OS X Tiger 10.4.x: Color profile - fast user switching bug

When using the fast user switching feature of Mac OS X 10.4.x (x == 1 to 8 at least) there is a nasty bug which screws up the color profile settings (if you use a custom color profile, which is very likely if you use a LCD screen).

The bug appears like this:
- you log in: color profile OK
- you switch to another user: color profile OK
- you switch back to the original user: color profile screwed up and can not be reset by the obvious means in the system settings

I found a workaround here which works pretty well:
http://www.macosxhints.com/article.php?story=20060103162354164

Thanks a lot for sharing this!

In short:
- to fix the problem temporarily (e.g. fix the color profile) start
/System/Library/Frameworks/ApplicationServices.framework/Versions/
A/Frameworks/CoreGraphics.framework/Versions/A/Resources/DMProxy
- to fix it permanently add this to the startup objects for all users

Have a colorful day!

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