Jacktrip on OS X
From CCRMA Wiki
This page describes how to set up Jacktrip on your Mac OS X machine for network performances.
Get and Install Jack
Find out about what Jack is here . It is essentially an application for connecting your sound card to 'Jack aware' audio programs like 'Jacktrip' with very low latency. Download it here http://www.jackosx.com. Unzip the download and install by clicking the Mac OS X installer package. Unless you know otherwise, just accept all the defaults for the install. You will be required to reboot your computer after the install.