Versions of Composer's Mosaic previous to 1.58 cannot run under OS9. Contact customer service at regarding an upgrade if you run an older version Mosaic. Make sure to include your Mosaic S/N, full address and phone number when you write.

If you have the version of Mosaic 1.58 that authorizes with the CD and keycode, you can install under OS 9 without any special considerations.

If you have the version of Mosaic 1.58 that came with a floppy keydisk and authorizes with challenge/response, we can no longer provide responses to challenges. You'll need to contact MOTU Tech Support to get a replacement installer that uses CD/keycode authorization.