Try building on macOS on CircleCI

.circleci/config.yml

@@ -52,11 +52,27 @@ jobs:
         - run: $SW/bin/python3 setup.py build --debug --verbose
         - run: $SW/bin/python3 test.py
 
+    mac-bundle:
+        macos:
+            xcode: "10.1.0"
+        environment:
+            LC_ALL: en_US.UTF-8
+            LANG: en_US.UTF-8
+            SW: /Users/Shared/buildbot/sw/sw
+        steps:
+            - checkout
+            - run: mkdir -p $SW
+            - run: curl https://download.calibre-ebook.com/travis/kitty/osx.tar.xz | tar xJ -C $SW
+            - run: echo "export PATH=$SW/bin:$PATH" >> $BASH_ENV
+            - run: python3 setup.py build --debug --verbose
+            - run: python3 test.py
+
 
 workflows:
     version: 2
     all_jobs:
         jobs:
+            - mac-bundle
             - lin-sys
             - lin-35
             - lin-37