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I have 2 accounts on my Mac Pro both are using the same color display profile however on my account it is clearly a lot brighter. I can test this by switching between the 2 accounts with the same image open in both accounts. On account A you can see the light shades of gray on account B the light shades of gray are missing and it just looks solid white.

I removed everything from account B's startup items and looked at the processes running on a clean boot into both accounts and the only differences are processes I expect to make no difference (mysql, perl etc.)

When I login into the account B (with the problem) that does have the problem I see the brightness change 2 times before finder and the rest of the desktop starts, whereas logging into account A doesn't seem to do this.

I would like to know what is causing this and stop it as it's very annoying.

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It sounds like a color profile issue.

Does account "B" have any custom color profiles installed in ~/Library/ColorSync/ ? If so try moving them out of that folder (to the Desktop, Trash, or wherever) then log out and back in to see if that helps.

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I've updated the title to be clearer but both accounts are using the exact same color profile – DEfusion Jan 15 '13 at 18:17
Also checked the users specific ~/Library/ColorSync/Profiles/ for account B and it doesn't have any of its own. Tried deleting all custom color profiles, logging out, logging in and both accounts still display differently. – DEfusion Jan 15 '13 at 18:53

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