My school uses nothing but Macs.
I use, every morning, a black MacBook for the school's morning show production. More specifically, what I basically do is update (and then display on the show) the graphics for the show. All the graphics, main show opener, segment openers, backgrounds, information slides, etc. are contained within a Microsoft PowerPoint presentation. It may seem like a "cheap" way of doing things, but it actually works quite well, and it doesn't take long to update, about 5-10 minutes, depending on what content we're airing that day.
One day, while we were on air live, for some reason, PowerPoint decided to crash.
Luckily, it hasn't done so since that day.