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separate.py

@@ -370,8 +370,12 @@ class SeperateDemucs(SeperateAttributes):
             self.load_cached_sources(is_4_stem_demucs=True)
         else:
             self.start_inference()
+
             if self.is_gpu_conversion >= 0:
-                self.device = torch.device('cuda:0' if torch.cuda.is_available() else 'cpu')   
+                if OPERATING_SYSTEM == 'Darwin':
+                    self.device = torch.device('mps' if torch.backends.mps.is_available() and self.demucs_version in [DEMUCS_V1, DEMUCS_V2] and 'Tasnet' not in self.model_name else 'cpu')
+                else:
+                    self.device = torch.device('cuda:0' if torch.cuda.is_available() else 'cpu') 
             else:
                 self.device = torch.device('cpu')