Actually, OS X Yosemite has a black menu bar built in, in 'dark mode': http://www.maclife.com/files/imagecache/futureus_imagegallery_fullsize/gallery/yosemite_d

Actually, OS X Yosemite has a black menu bar built in, in 'dark mode': http://www.maclife.com/files/imagecache/futureus_imagegallery_fullsize/gallery/yosemite_dark_mode.png http://www.maclife.com/files/imagecache/futureus_imagegaller... Unfortunately, not all apps support white menu bar icons and thus the result will vary.