Dantz Development today announced that the Retrospect Desktop Backup software for Mac OS now includes client licenses for backing up two additional computers on a home or small office network. In addition, Dantz has lowered the list price on Retrospect Desktop Backup 5.0 from US$249 to $129. Retrospect Desktop supports both Mac OS 9 and Mac OS X, and network clients can be desktops or notebooks running Mac OS 7, 8, 9, or X.