Interesting, I see you have set default parameter for most important parameter But it doesn't looks like you have set the following, that could be useful for you to better understand what is going on:

LogLevel=5 in /Library/simba/googlebigqueryodbc/lib/simba.googlebigqueryodbc.ini LogPath=XXXXX/logs/ in /Library/simba/googlebigqueryodbc/lib/simba.googlebigqueryodbc.ini