This is an updated Macintosh print driver providing full compatibility with the Mac OS X 10.7 operating system. This driver is compatible with Mac OS X 10.5, 10.6, and 10.7 only. Note: This driver is for the EFI Fiery v1.0 (iGen4 v2.01) system only. Separate drivers are available for EFI Fiery v2.0 and v3.0.