(Please email Wayne Maddison (wmaddisn@u.arizona.edu) with questions or comments about downloading Mesquite).
Download this for running Mesquite on the Mac OS:
Requirements: MRJ 2.2 (www.apple.com/java)
Instructions: Download and unstuff the .sit file above. This will create a folder approximately as follows:

To start Mesquite, you can double click either the icon "Mesquite OS 9", or double click a data file in "example files".
NOTE: If you have a previous version of Mesquite installed in your system, we advise that you delete it before running the new version.
Requirements: OS X 10.2 recommended; 10.1 with java update 1 has some especially frustrating bugs; Mesquite is more or less unusable with OS X 10.0.
Instructions: Download and unstuff the .sit file above. This will create a folder approximately as follows:

To start Mesquite, you can double click either the icon "Mesquite OSX", or double click a data file in "examples".
NOTE: If you have a previous version of Mesquite installed in your system, we advise that you delete it before running the new version.
More details of issues of using Mesquite under Mac OS X are described in the Support page.