Check for cuda is available for macos

wan/text2video.py

@@ -57,7 +57,7 @@ class WanT2V:
             t5_cpu (`bool`, *optional*, defaults to False):
                 Whether to place T5 model on CPU. Only works without t5_fsdp.
         """
-        self.device = torch.device(f"cuda:{device_id}")
+        self.device = torch.device("mps" if torch.backends.mps.is_available() else "cpu")
         self.config = config
         self.rank = rank
         self.t5_cpu = t5_cpu
@@ -259,6 +259,7 @@ class WanT2V:
         del sample_scheduler
         if offload_model:
             gc.collect()
+            if torch.cuda.is_available():
                 torch.cuda.synchronize()
         if dist.is_initialized():
             dist.barrier()