Fix Bonjour (pybonjour) on macOS

README.md

@@ -17,7 +17,7 @@
 
 - python3-pil (pillow) for support of webp avatars
 - python3-gnupg to enable GPG encryption
-- For zeroconf (bonjour) you need python3-dbus
+- For zeroconf you need python3-dbus on Linux or [pybonjour](https://dev.gajim.org/lovetox/pybonjour-python3) on Windows/macOS
 - gir1.2-gspell-1 and hunspell-LANG where lang is your locale eg. en, fr etc
 - gir1.2-secret-1 for GNOME Keyring or KDE support as password storage
 - D-Bus running to have gajim-remote working

gajim/common/app.py

@@ -200,10 +200,12 @@ def detect_dependencies():
 
     # ZEROCONF
     try:
-        if os.name == 'nt':
         import pybonjour  # pylint: disable=unused-variable
         _dependencies['PYBONJOUR'] = True
-        else:
+    except Exception:
+        pass
+
+    try:
         import dbus  # pylint: disable=unused-variable
         _dependencies['PYTHON-DBUS'] = True
     except Exception: