If you find yourself yearning for the old days of OS 9, WonderHowTo shows you how to give Yosemite a classic black-and-white look by tweaking just a handful of settings.
The process to get the classic look is pretty easy. You'll switch on Increase Contrast, switch over to Graphite Appearance, change your wallpaper to a dark grey, then get rid of the toolbar in Finder. If you want to go all-in, you can use Grayscale mode as well, but that might be a little too far for most of us. Still, it's a nice little set of tweaks that drains the colour out of Yosemite a bit for a pleasant, simple pre-OS X look. Head over to WonderHowTo for the full guide.