Computing Topics --> Help With Application Programs --> Terminal (Telnet And Others) --> 3270 Terminal Software for the Mac --> Brown University's tn3270 for the Mac -->
If you wish to use a Macintosh tn3270 client, please refer to the following link from Brown University: http://www.brown.edu/Facilities/CIS/tn3270/
You will need to access tn3270 mainfram thru VPN.