You are a little out of luck. JackPilot (the control GUI that comes with JackOSX) doesn’t provide a way to control the number of ports that JACK starts with. Visit this page and get QJackctl, and alternative control GUI for JACK. In its setup dialog, you can specify how many ports you want. Ports are cheap - 512 is a good number.
Hi I am having the same problem with the latest version of Mixbus (Mac OSX 10.6.4) “restart JACK with ports”. QJackctl I can only find as linux. What do I have to do here? Thanks Billy Pace