Model: Epson Stylus Pro 9900
Operating System: Mac OS (Note: might work with other versions of this os.)
OS: Intel-based Macs with OSX (v10.4.9 - v10.5.x),PowerPC Macs with OSX (v10.4.9 - v10.5.x)
This file contains the Epson Stylus Pro 9900 Printer Driver v6.55. This driver corrects possible issues with Advanced Black White printing from Adobe Photoshop CS4. Installation instructions (some of the following steps may not be necessary): Download the file. Double-click the downloaded file to create a disk image on your desktop. Open the disk image. Double-click the installer icon to begin the installation.