diff --git a/ui-macos/main.py b/ui-macos/main.py
index 3e6c2a1..7915e91 100644
--- a/ui-macos/main.py
+++ b/ui-macos/main.py
@@ -87,7 +87,10 @@ class Runner:
         return self.rv
 
     def wait(self):
-        return self._try_wait(0)
+        rv = None
+        while rv is None:
+            self.gotdata(None)
+            rv = self._try_wait(os.WNOHANG)
         
     def poll(self):
         return self._try_wait(os.WNOHANG)