I then question your need for low latency? OS X and MacOS requires just as much work to get to the lowest latency and your handicapped if your have an Apple laptop. Your latency will be about the same as PusleAudio on Linux if you use default OS X MacOS settings. In most real world settings Windows will get a lower latency mostly due to better hardware on a Professional setup compared to the less then top end audio of Apple. Apple machine require a lot of engineering in the software to achieve low latency.

Here is the focusrite help page dealing with latency and what you must turn off for recording. https://support.focusrite.com/hc/en-gb/articles/207546515-Op...