[tomwalsham]

These sorts of issues (primarily related to auxiliary functions in grep, sed, etc) can cause portability issues when developing locally for linux systems, but no worse thanks, say, writing for fedora on an Ubuntu box. Brew is okay but a bit sparse. For me I mostly miss Gnome

[lukeschlather]

I think it's clear it's going to get a lot worse with Apple purging GNU utils.

[Evbn]

It is worse. Fedora is Linux. OS X is BSD.