[squeaky-clean]

Those links are either out of date or completely incorrect. None of this has ever been necessary for me on a Mac.

Focusrite doesn't even offer Mac drivers for most of their products, as the support is built in, for example[0], so I don't know why it's advising you to update your drivers.

[0] https://us.focusrite.com/downloads?product=Scarlett+2i4

[eropple]

Seriously. A friend brought over his 2i4 for a project and my Mac was able to plug-and-play with it at 5ms latency.

That page is "dissuade people from calling tech support", not the reality of how audio actually works on OS X.

[baldfat]

There is no way you have 5ms latency with a USB port. Your measuring it wrong. USB audio devices have built in buffers that add to your 5ms latency.

http://www.soundonsound.com/sound-advice/q-which-audio-inter...

yes its 2009 but it is still sound science.