PostScript fax support is not supported with the LaserWriter 8.4 printer driver. In order to retain full support of the fax functions, you must continue to use the LaserWriter 8.2.3f printer driver. If you use the latest 8.3.x printer driver (8.3.4), you have limited functionality when faxing documents. In order to maintain the highest level of functionality, Apple recommends using the LaserWriter 8.2.3f printer software with all LaserWriter fax devices.