Create a group container for macOS sandbox, and on Mac put the Tor data dir in it

install/macos_sandbox/parent.plist

@@ -4,6 +4,8 @@
 <dict>
 	<key>com.apple.security.app-sandbox</key>
 	<true/>
+	<key>com.apple.security.network.server</key>
+	<true/>
 	<key>com.apple.security.network.client</key>
 	<true/>
 	<key>com.apple.security.files.user-selected.read-only</key>
@@ -11,6 +13,10 @@
 	<key>com.apple.security.temporary-exception.files.home-relative-path.read-write</key>
 	<array>
     <string>/OnionShare</string>
+  </array>
+	<key>com.apple.security.application-groups</key>
+    <array>
+        <string>com.micahflee.onionshare</string>
     </array>
 </dict>
 </plist>

onionshare/onion.py

@@ -166,6 +166,11 @@ class Onion(object):
                 raise BundledTorNotSupported(strings._('settings_error_bundled_tor_not_supported'))
 
             # Create a torrc for this session
+            if self.common.platform == 'Darwin':
+                group_container_dir = os.path.expanduser('~/Library/Group Containers/com.micahflee.onionshare')
+                os.makedirs(group_container_dir, exist_ok=True)
+                self.tor_data_directory = tempfile.TemporaryDirectory(dir=group_container_dir)
+            else:
                 self.tor_data_directory = tempfile.TemporaryDirectory()
 
             if self.common.platform == 'Windows':

onionshare/settings.py

@@ -163,11 +163,7 @@ class Settings(object):
         Save settings to file.
         """
         self.common.log('Settings', 'save')
-
-        try:
-            os.makedirs(os.path.dirname(self.filename))
-        except:
-            pass
+        os.makedirs(os.path.dirname(self.filename), exist_ok=True)
         open(self.filename, 'w').write(json.dumps(self._settings))
         self.common.log('Settings', 'save', 'Settings saved in {}'.format(self.filename))