Sending MIDI from Logic to Motion

Inter-application MIDI is done using OSX's IAC virtual MIDI port.

Go to the Audio MIDI Setup utility, and enable the IAC driver. Now, in all MIDI-aware applications, the IAC inputs and ouputs will show up.

In Logic, create an instrument in the environment page, and set it's Cha parameter to IAC Channel 1. Assign that instrument to the arrange page, and when you play your keyboard or regions in the arrange window, they'll get output to the IAC driver.

In Motion, configure it to receive MIDI from IAC Channel 1.

Take a look at "midipipe" and "midi patchbay" too.(free downloadables)
They're probably just front-ends for the IAC bus, but sometimes GUI is good.

Be wary when enabling virtual midi patches cause logic sums all inputs which can create a feedback loop. It seems to not hang my computer indefinately when it happens nowadays, just freeze it for a few seconds then give me a few seconds to fix it before freezing again for a while.

If your getting into realtime midi to graphics also check out "quartz composer" in the osx developer tools too.

..or "pure data" with GEM if your real brave.