NSColor.labelColor is only available in macOS 10.10 and later. This change allows the "Mojave" tab style (introduced by #62) to be used back to macOS 10.9 for those applications that still require support for macOS 10.9 but want a tab style that works with macOS 10.14 DarkAqua as well.
NSColor.labelColor is only available in macOS 10.10 and later. This change allows the "Mojave" tab style (introduced by #62) to be used back to macOS 10.9 for those applications that still require support for macOS 10.9 but want a tab style that works with macOS 10.14 DarkAqua as well.