Mac Wireframe .sketch
Can wriferame be categorized as UI Kit? Do you even care?
Anyway, it’s great that Adrien Rochet creates this. I hope this helps add a lot more high quality apps for OS X. It’s like everybody only works on mobile apps these days.
Helpful hint: Dribbble users are nice. If the license is unknown, it is usually because they forgot to mention it explicitly; not because they were being stingy. Ask nicely and they will probably allow you to use it.