Consolas looks just fine on OS X. A licensed version of it comes with BBEdit. The only curious thing about it I've noticed is that it requires good font smoothing--unaliased, it looks absolutely horrible.

It's also one of the very few monospaced fonts I've seen that has a true italic.

Google's Droid Sans Mono is a pretty good copy of Consolas:

https://www.google.com/webfonts/specimen/Droid+Sans+Mono

You can get Consolas (and the other 'C' fonts) by installing MS Powerpoint Viewer.