Adobe Systems Inc. on Monday began shipping FrameMaker 7.1, but don't expect a Mac version, company officials said.

FrameMaker 7.1, an upgrade to Adobe's enterprise publishing software, is only available for Windows and Sun Solaris operating systems; Mac users will have to use Version 7.0, which shipped in 2002. That version is not natively compatible with Apple's Unix-based Mac OS X, so Mac customers can only run it on the legacy Mac OS 9 system or through OS X's "Classic" compatibility layer.

"Adobe has announced no plans to release FrameMaker 7.1 on the Mac OS X platform," the company said in a statement. Adobe said it will continue to sell and support Version 7.0 on the Mac for OS 9 and Classic.

Looking beyond Version 7.1, sources said Adobe has apparently pulled the plug on development of future Mac FrameMaker upgrades as well, which would rule out an eventual Mac OS X release. Adobe representatives would not confirm the reports, citing company policy.

Some users are urging Adobe to reconsider. "The lack of native Mac OS X and Linux versions of FrameMaker is a real problem for me," said David Dean of Austin, Texas, who has used FrameMaker to create technical documentation. "The cross-platform file compatibility and the long-document handling features are what really made FrameMaker stand out from Word or other programs," he said. "The ability to pass files around between Windows, Mac and Unix without any problem is a major factor contributing to FrameMaker's usefulness."

Dean said he finds it "really annoying" to switch to other operating systems to view and edit FrameMaker documents, and said he "would much prefer to do that directly on Linux and Mac OS X." In 1999 Adobe offered a beta version of FrameMaker for Linux, but did not maintain the project for more recent versions, such as FrameMaker 7.0. Dean said that the effort was discontinued due to lack of interest from paying customers, but that today's Linux market is larger than in 1999.

"It would be great to see Adobe re-release FrameMaker for Linux," he said. "And while they're at it, they could release a Mac OS X version!"

David Randall, a professor at Colorado State University in Fort Collins, Colo., said that if Adobe won't release a Mac OS X-compatible version of FrameMaker, it needs to offer Mac users another application that can import documents with equations intact, a capability not available from the company's InDesign page-layout package. "There is no way that I will switch to Windows so that I can keep using [FrameMaker]," he said. Randall said that when he began using FrameMaker, "one of the big attractions" was the product's availability on different platforms, but he noted that was before Adobe acquired Frame Technology, FrameMaker's developer, in 1995.

Randall said he uses FrameMaker on the Mac for memos and technical papers that he anticipates would be easy to switch to another application. However, he also uses the product to prepare class notes containing "thousands of equations," which he said he would need to retype manually in another application.

San Jose, Calif.-based Adobe announced FrameMaker 7.1 in December 2003. The upgrade features enhancements to XML support, document cross-referencing and new import capabilities, among other improvements. The Windows version costs $799, and upgrades are $199 each; the Sun Solaris version carries a price tag of $1,329, with $279 upgrades.