If you can’t see any interfaces in Wireshark on your Mac, it’s probably a permissions issue. Try running Wireshark from the command line as root:
su root open -a "Wireshark" # assumes app is in Applications folder
If you don’t have the password to root but you are an admin user and (hopefully) you know your password, try editing the permissions on the appropriate Wireshark network sniffers:
cd /dev sudo chown `whoami`:admin bp* ls -la | grep bp
I didn’t have the root password so this last one worked for me.