diff --git a/hyperwall/macos_profile.py b/hyperwall/macos_profile.py
index 8334a58..b2bd378 100644
--- a/hyperwall/macos_profile.py
+++ b/hyperwall/macos_profile.py
@@ -16,7 +16,7 @@
 )
 _THERMAL_RE = re.compile(r"^Current pressure level:\s*(?P<level>\S.*)\s*$")
 _GPU_IDLE_RE = re.compile(r"^GPU idle residency:\s*(?P<idle>[0-9]+(?:\.[0-9]+)?)%")
-_THREAD_RE = re.compile(r"^\s*Thread\b")
+_THREAD_RE = re.compile(r"^\s*(?:\d+\s+)?Thread(?:[_\s]|$)")
 _PERMISSION_MARKERS = (
     "must be invoked as the superuser",
     "not permitted",
diff --git a/tests/test_macos_profile.py b/tests/test_macos_profile.py
index f7c2979..282ab74 100644
--- a/tests/test_macos_profile.py
+++ b/tests/test_macos_profile.py
@@ -80,6 +80,26 @@ def test_sample_parser_counts_native_hot_stack_labels():
     assert report["labels"]["_PyEval_EvalFrameDefault"] == 1
 
 
+def test_sample_parser_accepts_macos_thread_rows_with_numeric_prefix():
+    from hyperwall.macos_profile import parse_sample_stacks
+
+    sample = """\
+Process:         Python [75185]
+Call graph:
+    2930 Thread_1168979   DispatchQueue_1: com.apple.main-thread  (serial)
+    + 2930 _PyEval_EvalFrameDefault  (in Python) + 10488
+    265 Thread_1168991
+    + 1 libmpv.2.dylib             mpv_render_context_render
+"""
+
+    report = parse_sample_stacks(sample)
+
+    assert report["complete"] is True
+    assert report["thread_count"] == 2
+    assert report["labels"]["_PyEval_EvalFrameDefault"] == 1
+    assert report["labels"]["mpv_render_context_render"] == 1
+
+
 def test_sample_parser_marks_empty_capture_incomplete():
     from hyperwall.macos_profile import parse_sample_stacks