diff --git a/demo_part3.ipynb b/demo_part3.ipynb
index 2033310..9b2bd34 100644
--- a/demo_part3.ipynb
+++ b/demo_part3.ipynb
@@ -105,6 +105,8 @@
     "        speaker_key = speaker_key.lower().replace('_', '-')\n",
     "        \n",
     "        source_se = torch.load(f'checkpoints_v2/base_speakers/ses/{speaker_key}.pth', map_location=device)\n",
+    "        if torch.backends.mps.is_available() and device == 'cpu':\n",
+    "            torch.backends.mps.is_available = lambda: False\n",
     "        model.tts_to_file(text, speaker_id, src_path, speed=speed)\n",
     "        save_path = f'{output_dir}/output_v2_{speaker_key}.wav'\n",
     "\n",