McAfee Security 1.1 (VirusScan 9.1) build 1309 is compatible with Mac OS X 10.5 Leopard (Intel only), Mac OS X 10.6 (Snow Leopard), and Mac OS X 10.7 (Lion).
Vanderbilt departments and students may download McAfee Security 1.1 free of charge for use on Vanderbilt and student-owned Macs. You may download the software from http://its.vanderbilt.edu/antivirus, or through http://its.vanderbilt.edu/softwarestore.