I did serve a company internal tool written in PHP/mysql from a white macbook. It was served to all our retail locations (under 100 DAUs). It was a "but it works on my machine" - "back up your email, your machine is going into production" situation. It ended up taking almost two years to migrate the application away because it just worked. Picture of said server macbook https://flic.kr/p/DY4k1U