remove if platform.system() == 'Darwin' checks

utils/google_utils.py

@@ -31,10 +31,7 @@ def attempt_download(weights):
         try:  # GitHub
             url = 'https://github.com/ultralytics/yolov5/releases/download/v3.0/' + file
             print('Downloading %s to %s...' % (url, weights))
-            if platform.system() == 'Darwin':  # avoid MacOS python requests certificate error
-                r = os.system('curl -L %s -o %s' % (url, weights))
-            else:
-                torch.hub.download_url_to_file(url, weights)
+            torch.hub.download_url_to_file(url, weights)
             assert os.path.exists(weights) and os.path.getsize(weights) > 1E6  # check
         except Exception as e:  # GCP
             print('Download error: %s' % e)