Metis International has Desktop Calendar Pro, which does essentially the same thing for a lower price. Likewise, if you have Printshop or Print Explosion, you can do the same kinds of calendars. I have the old version of CalendarMaker, the last released for OS 9, and it works fine in the Classic OS environment. Version 5.0 for OS X really doesn't seem to be such a great improvement, at least not one that merits the nearly $60 price tag.