Dantz has denied that it has turned its back on the Mac market, following its failure to ship a Carbonized version of Retrospect, its widely used back-up and archiving utility.

Eric Ullman, Dantz technical marketing, said: "Dantz has been taking a lot of heat for not already having completed development of Retrospect Backup for Mac OS X. This is very frustrating to us, because we're doing everything we can to see this product to market.

"We have more Mac engineers now than at any point in history."

The Carbonized version of Retrospect has been in development since late 1999, but has hit problems. Ullman said: "Creating a back-up application that's fully aware of the duality present in Mac OS X's file system is no easy task. HFS+ flags, data and resource forks, hard links, UNIX-style file permissions, and other file metadata must be properly backed up and restored."

The company also admits that the initial release of Mac OS X lacked capabilities required by Retrospect and other storage type applications, such as DVD Player and Toast. "Apple has been working diligently to add these capabilities to the OS," Ullman reveals.

Mac OS X 10.1 does have the level of support Retrospect needs, Ullman claims, but he added that "it doesn't solve several issues that prevent Retrospect from successfully restoring a complete Mac OS X system to a functioning state". he stressed that Apple and Dantz have been working to resolve these issues.

The company expects the OS adjustments and product testing to reach completion in time for the release of a full product late in the first quarter of 2002. The company urges users not to rely on the Retrospect beta client for back-up, because of the above problems.

Ullman said: "In the interim, users requiring data back-up should periodically copy critical files onto removable media for off-site storage, or at the very least, make duplicate copies onto an additional hard-disk drive. The beta Retrospect client for Mac OS X may be used, but it will not allow for the restoration of much more than a user's files."