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There’s a good post here about the use of gamma (a unit of luminance) and colour profiles as used by PCs and Macs. It’s really only important if you create graphics for use on the web – the effects can be seen here. The upshot is that if this applies to you, then it’s worth changing your mac gamma setting to 2.2, rather than the 1.8 that is default on macs. Even Apple suggest you do this. You can do it by going to System Preferences > Displays > Color and then selecting the sRGB IEC61966-2.1 colour profile.


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