Solution

Projects created in previous versions of The Print Shop® cannot be opened in The Print Shop® for Mac OS® X. Changes have been made to The Print Shop® for Mac to allow it to function on Mac OS® X. As a result, The Print Shop® for Mac OS® X is incompatible with other versions of The Print Shop® (Windows® or Macintosh®) and is therefore unable to open projects saved in previous versions of Print Shop®.