Disable macOS check for now

Author: joshuawright11

.github/workflows/test.yml

@@ -9,6 +9,7 @@ on:
 
 jobs:
   test-macos:
+    if: ${{ false }}  # disable until macOS 12 (with concurrency) runners are available.
     runs-on: macos-12
     env:
       DEVELOPER_DIR: /Applications/Xcode_13.2.app/Contents/Developer