We’ve put together various HOWTO videos that should help you get to the serial console on different OSes with different configurations, (Warp standalone or via the Interposer board). We’ve covered Linux, Mac and Windows.
You can find the bundle of videos over on our YouTube channel. Otherwise, here are direct links for each:
Serial Console, standalone Warp on Linux
Serial Console, standalone Warp on MacOS
Serial Console on Warp via Interposer on MacOS
Serial Console on Warp via Interposer on Linux