When I use a NSButton with style 'Round Rect', type 'Toggle' and an image, the image and title will be nicely rendered in blue, when the State is set to On.
However, when I also add an alternate image, this highlight effect is gone.
Is there a simple way to fix this?
I want to achieve the same effect as the small tab bar icons on top of the Inspector in Xcode: blue when selected, using an alternate image (slightly bolder), black when not selected, using the default image.
This is the expected behavior. The system only transforms your template to apply the visual highlight if you don't supply your own alternate (active / lit / on) version.