Multiprocessing support for MAC

cloud_governance/main/main.py

@@ -1,4 +1,7 @@
 import os
+import platform
+from multiprocessing import set_start_method
+
 import typeguard
 from ast import literal_eval  # str to dict
 import boto3  # regions
@@ -328,4 +331,9 @@ def run_gcp_policy_runner():
                     run_policy(account=account, policy=policy, region=region_env, dry_run=dry_run)
 
 
-main()
+if __name__ == '__main__':
+    # spawn default in mac:
+    # https://docs.python.org/3/library/multiprocessing.html#:~:text=The%20default%20on%20Windows%20and%20macOS.
+    if 'macos' in platform.platform(terse=True).lower():
+        set_start_method('fork')
+    main()