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Dell U2713HM with Mac OS X, gamma caveat.
2013 Jun 28
One minute read

Dell U2713HM with Mac OS X, gamma caveat.

There is «Gamma» setting in monitor on screen menu:

Menu -> Color Settings -> Gamma -> PC/MAC

If you think that on Mac OS X you need simply use MAC option you wrong.

Gamma is a numerical value that describes the relationship between the varying levels of brightness or luminance that a monitor can display …

… Mac OS X v10.6 Snow Leopard uses a gamma value of 2.2 by default. In versions of Mac OS X prior to 10.6, the default system gamma value was 1.8.

In most computer systems, images are decoded with a gamma of 2.2

In case of Dell settings «PC» option is match 2.2 and «MAC» option - 1.8 value.

So for Microsoft Windows and the rest of the world «PC» option is fine.

For Mac OS X 10.5 (Leopard) and earlier you must use «MAC» option (1.8).
For Mac OS X 10.6 (Snow Leopard) and later use «PC» option (2.2).

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