diff --git a/.gitignore b/.gitignore
index c84066d..e9387ef 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,7 @@
 # Python
 .venv
 __pycache__
+.python-version
 
 # Docs
 docs/_build
diff --git a/graphbook/state.py b/graphbook/state.py
index 87ae867..84f3e3e 100644
--- a/graphbook/state.py
+++ b/graphbook/state.py
@@ -371,8 +371,8 @@ def clear_outputs(self, node_id: str | None = None):
             if node_id in self._queues:
                 self._queues[node_id].clear()
                 step = self._steps[node_id]
-                for p in step.parents:
-                    self._queues[p.id].reset_consumer_idx(id(step))
+                for parent_id in self._step_graph["parent"][node_id]:
+                    self._queues[parent_id].reset_consumer_idx(id(step))
                 self._step_states[node_id] = set()
                 self.view_manager.handle_queue_size(
                     node_id, self._queues[node_id].dict_sizes()
diff --git a/graphbook/web.py b/graphbook/web.py
index 10b5705..b6f23e6 100644
--- a/graphbook/web.py
+++ b/graphbook/web.py
@@ -479,6 +479,10 @@ def create_sample_workflow(workflow_dir, custom_nodes_path, docs_path):
 
 
 def start_web(args):
+    # The start method on some systems like Mac default to spawn
+    if not args.spawn and mp.get_start_method() == "spawn":
+        mp.set_start_method("fork", force=True)
+
     cmd_queue = mp.Queue()
     parent_conn, child_conn = mp.Pipe()
     view_manager_queue = mp.Queue()