fix(frontend-python): raise error when dataflow is enabled in macOS instead of crashing

frontends/concrete-python/concrete/fhe/compilation/configuration.py

@@ -2,6 +2,7 @@
 Declaration of `Configuration` class.
 """
 
+import platform
 from copy import deepcopy
 from enum import Enum
 from pathlib import Path
@@ -204,6 +205,10 @@ class Configuration:
             message = "Insecure key cache cannot be enabled without specifying its location"
             raise RuntimeError(message)
 
+        if platform.system() == "Darwin" and self.dataflow_parallelize:  # pragma: no cover
+            message = "Dataflow parallelism is not available in macOS"
+            raise RuntimeError(message)
+
 
 def __check_fork_consistency():
     hints_init = get_type_hints(Configuration.__init__)