Fixed removable drive for OSX

plugins/RemovableDriveOutputDevice/OSXRemovableDrivePlugin.py

@@ -44,7 +44,7 @@ class OSXRemovableDrivePlugin(RemovableDrivePlugin.RemovableDrivePlugin):
         return drives
 
     def performEjectDevice(self, device):
-        p = subprocess.Popen(["diskutil", "eject", path], stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+        p = subprocess.Popen(["diskutil", "eject", device.getId()], stdin = subprocess.PIPE, stdout = subprocess.PIPE, stderr = subprocess.PIPE)
         output = p.communicate()
 
         return_code = p.wait()