Einhugur macOS Bridge plugin.

NSButton.AlternateImage Property

An alternate image that appears on the button when the button is in an on state.

AlternateImage as EinhugurMacOSBridge.NSImage {Read and Write}

Remarks

The value of this property is nil if there is no alternate image for the button. Note that some button types don’t display an alternate image, and buttons don’t display images by default. If you use this property to set an image, the button redraws its contents if necessary.

As far as we can see then NSButton on TouchBar does not use alternate image.

See Also

NSButton Class