Lexmark X73 Driver for Mac OS 8.6, 9 and Carbonlib 1.4. Package Version 1.1.a. Once downloaded, double-click on the icon "Install" in the CJMC73LE folder on your desktop. Please make sure your USB cable is connected to the Mac from the Lexmark X73. Your Lexmark X73 should be powered on. Then, follow the on-screen instructions.