EPSON AcuLaser C9200 Series User's Guide
Note for Macintosh users:
When you have attached or removed printer options, you need to delete the printer using Print & Fax (for Mac OS X 10.5) or Print Setup Utility (for Mac OS X 10.4 or below), and then
1.Turn the printer off and unplug the power cord and interface cable.
2.Remove the connector cover.
3. Unplug the connector of the Duplex Unit from the socket on the printer.
Installing Options 144