According to a post in the ConceptDraw Labs blog, the Mac OS X version of ConceptDraw MINDMAP 5 will be delayed until August.
"With MINDMAP 5 for the Macintosh we are doing a complete rewrite of the product, not only have we upgraded the user interface and the product feature set, but MINDMAP 5 will also support the Macintosh platform in native mode. This will dramatically improve the performance of our product for Macintosh users."
The developer has also committed that anyone who purchases ConceptDraw MINDMAP 4 for Mac after June 15, 2007 will receive a free upgrade to version 5 when it is released. The Windows version of ConceptDraw MINDMAP 5 was released in mid-April.