Fix issue with OSX.

comfy/model_management.py

@@ -456,7 +456,13 @@ def mps_mode():
 
 def is_device_cpu(device):
     if hasattr(device, 'type'):
-        if (device.type == 'cpu' or device.type == 'mps'):
+        if (device.type == 'cpu'):
+            return True
+    return False
+
+def is_device_mps(device):
+    if hasattr(device, 'type'):
+        if (device.type == 'mps'):
             return True
     return False
 
@@ -468,7 +474,7 @@ def should_use_fp16(device=None, model_params=0):
         return True
 
     if device is not None: #TODO
-        if is_device_cpu(device):
+        if is_device_cpu(device) or is_device_mps(device):
             return False
 
     if FORCE_FP32: