Hi,
Thanks for the report. The initial high CPU is expected, but it should calm fairly quickly and then stay that way unless you are actively syncing. Are you seeing persistently high CPU?
We are taking a look at the quit scenario to see if there is something that can be adjusted there.
Regarding your second issue… We just released a new build which is available from https://www.odrive.com/add-ons/sync that should support using Applescript to quit the odrive application. Can you give it a shot and let us know if it works for you?