diff --git a/cpu_cores/darwin.py b/cpu_cores/darwin.py
index 154e1b5..e2d711b 100644
--- a/cpu_cores/darwin.py
+++ b/cpu_cores/darwin.py
@@ -27,9 +27,11 @@ def _count(self, command=None):
             for line in lines:
                 tmp = line.strip()
                 if tmp.startswith(b'Total Number of Cores:'):
-                    self._physical_cores_count = int(tmp.split(b':')[1])
-                if tmp.startswith(b'Number of Processors:'):
+                    tmp = int(tmp.split(b':')[1].split(b'(')[0])
+                    self._physical_cores_count = tmp
+                elif tmp.startswith(b'Number of Processors:'):
                     self._physical_processors_count = int(tmp.split(b':')[1])
-        if self._physical_processors_count is None or \
-                self._physical_cores_count is None:
+        if self._physical_cores_count is None:
             raise Exception('impossible to get the cpu cores count (darwin)')
+        if self._physical_processors_count is None:
+            self._physical_processors_count = 1
diff --git a/test-requirements.txt b/test-requirements.txt
index 2245fc6..c162b8d 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -1,4 +1,4 @@
 -r pip-requirements.txt
 
-nose==1.2.1
+nose==1.3.7
 coverage==3.6
diff --git a/tests/darwin2 b/tests/darwin2
new file mode 100644
index 0000000..35b03ba
--- /dev/null
+++ b/tests/darwin2
@@ -0,0 +1,16 @@
+Hardware:
+
+    Hardware Overview:
+
+      Model Name: MacBook Pro
+      Model Identifier: MacBookPro18,4
+      Chip: Apple M1 Max
+      Total Number of Cores: 10 (8 performance and 2 efficiency)
+      Memory: 64 GB
+      System Firmware Version: 7429.41.5
+      OS Loader Version: 7429.41.5
+      Serial Number (system): Y0XXXXXXXX
+      Hardware UUID: FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF
+      Provisioning UDID: 00006001-FFFFFFFFFFFFFFFF
+      Activation Lock Status: Disabled
+
diff --git a/tests/test_darwin.py b/tests/test_darwin.py
index 1264cfe..198b5bc 100644
--- a/tests/test_darwin.py
+++ b/tests/test_darwin.py
@@ -31,6 +31,11 @@ def test_darwin_count1(self):
         self.assertEqual(x._physical_cores_count, 2)
         self.assertEqual(x._physical_processors_count, 1)
 
+    def test_darwin_count2(self):
+        x = self._test_darwin_count()
+        x._count('cat %s' % os.path.join(self._dir(), 'darwin2'))
+        self.assertEqual(x._physical_cores_count, 10)
+        self.assertEqual(x._physical_processors_count, 1)
 
 if __name__ == '__main__':
     unittest.main()