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i've installed mac version from kyngchaos including all required packages ...
... and just noticed the following:
interesting detail: pressing "apply" in mac version doesnt change anything and if you press "OK" and re-open layer properties the "render type"-setting has swiched back to "singleband grey".
even more interesting: "singleband grey" is faulty too: none of the options "color gradient", "min", "max", "contrast enhancement" does affect the way the tif is displayed, neither do the "load min/max values" settings !
anyone any ideas?