Although Logic support ReWire, this is only when Logic is the ReWire host. Logic has some great virtual instruments included, and it is sometimes handy to have access to these virtual instruments in other software.
This blog post will cover a basic and straightforward setup on how to use Logic's virtual instruments in Ableton Live.
We can sum up this setup as follows:
• MIDI data is sent from Live to Logic via the IAC MIDI Bus
• Audio data is sent from Logic to Live via the SoundFlower virtual audio routing device
• Audio data is sent from Live to the user via the built-in audio output
Here is a brief example video. MIDI data is sequenced and played back from Live using Live's transport. The notes are sent to Logic, where a virtual instrument plays them. The audio comes back into Live.
Add the following audio devices to this aggregate device: Built-in Output, Built-in Microphone, SoundFlower (2ch). Rename the aggregate device to "Built-in + SoundFlower".
Make sure that the "Device is online" button is ticked.