I get no output from that command.

Okay, but I discovered something interesting. The command seems to return the PulseAudio version number when I run with sudo, i.e.:

sudo /Applications/x2goclient.app/Contents/exe/pulseaudio --version 2>/dev/null

I get output:

pulseaudio 10.0-rebootstrapped

I also tried logging into my other administrator account, and x2goclient seems to work fine on that account. So for whatever reason it seems that the permissions on my regular user account are mesed up... I'm not sure what do to about this, I might need to restore to a backup. But at least for the time being I can use the client.

Thanks for the help Mihai,

Sean