DeskTape Pro for Mac

From Optima Technologies:

DeskTape Pro is the fastest and easiest way to use tape. Only DeskTape software allows you to use the Macintosh Finder or Speed Doubler to copy files directly to a mounted tape volume. No other tape backup utility allows such easy access to gigabytes of data, graphic images, or digital audio or video files. With DeskTape software, there are no applications to open, no complicated copy operations to set up. Simply insert a tape cartridge, initialize it, then copy individual files, folders, or entire volumes to the mounted tape. It's that simple. Additional data can be easily added at any time until the tape is full. Then, simply re-initialize it to use it over again. DeskTape uses a custom Erase Tape dialog that replaces the standard Finder Erase Disk dialog. This allows you to specify tape specific settings like hardware data compression when initializing tapes. DeskTape supports Extended HFS volumes available since Mac OS 8.1. This increases the available capacity and speed of tape volumes. For example, a 25 GB tape volume using Standard HFS could have wasted up to 400 KBytes per file. Extended HFS reduces this waste by a factor of 100. Unlike other tape backup utilities, DeskTape eliminates the need to send along a separate disk containing the tape's directory. With DeskTape, the tape's directory is temporarily stored on your hard disk and automatically copied to the tape when it is ejected. A copy of the DeskTape control panel allows other drives to read any DeskTape volume.