Our website provided a free download of MRWFormat 2.4 for Mac. The application lies within Design & Photo Tools, more precisely Viewers & Editors.
From the developer:
MRWFormat is a plug-in for Adobe Photoshop (and other compatible software) to open and pre-process raw images taken by Minolta DiMAGE digital still cameras. The main goal of this plug-in is to allow the user to use all the benefits of shooting in RAW format, giving him complete control over every step of image processing.
You may want to check out more software for Mac, such as Umajin, MultiTouchFlickrViewer or Photoshop 101, which might be related to MRWFormat.