Wordperfect, as one of the leaders in the word-processing sector, could not ignore the Macintosh platform. The published versions of the program, on the Macintosh, are following:
Those files import without difficulties in the corresponding (or higher) Wordperfect versions (on the PC or on other platforms, Unix and the like).
You don't have any other solutions to import the data in other word processors.
For an example, Word for Windows imports and exports Wordperfect 5 files (for DOS/Windows) but ignores Mac Wordperfect files.