Manuscript for Mac OS can export any of four file formats - PDF, RTF, DOC, DOCX, TXT, and MANUSCRIPT (XML).

Formats PDF, RTF, DOC, DOCX, TXT are only for viewing. Please be aware that once the manuscript has been exported, you can't import it back in its textual form. That's because each word processor has different formatting options and we have no way of knowing what is a chapter header or a new paragraph. So the export is one way only, to use when your manuscript is complete.

With that said, there is a way to export a manuscript. Edit it externally and import it while still retaining the changes by choosing Full Version (MANUSCRIPT) as your export options, changing the file using plain text editor such as Notepad or TextWrangler, and importing it back. Be careful not to delete any XML tags.