Retrospect Desktop 6.1, from EMC Insignia, is one of four editions of the software available for Macs. The Workgroup and Server editions add features to handle large networks and computers running OS X Server; the Express edition, bundled free with numerous hard drives and optical drives, omits network backups and tape drive support. Retrospect’s design caters to the needs of network administrators, who must grapple with backing up numerous computers (both Mac and Windows). For the average home or small business user, though, Retrospect can be intimidating.