Ibm 3270 for Mac

You don't provide any details regarding the requirements for the emulator so you might have a look at:

https://www.brown.edu/cis/tn3270/

Or try https://www.google.com/search?q=3270+emulator+OSX&ie=utf-8&oe=utf-8 . There are several possibilities that may meet your needs.

Some choices, but know what your school mainframe hardware is, the connection type, actual Terminal emulation model required, file transfer, and function key support that you will need. Not all of the following listed 3270 emulators offer full 3270 extended support.

1. OS X App Store - Mocha tn3270 lite (free), or tn3270 ($30, more features)
2. Emtech ZOC Terminal- 30 day trial, and then $90. Compare the features in this with what your school requires.
3. Brown University - TN3270 v3.4.0 (free), 3278e is an experimental support, so if you need it, this may not be the freebie you want.
   1. This looks to be a messy install, 32-bit Universal PPC/Intel app, and installs bitstream fonts.
   2. Not updated since 2013 but they claim it was tested with 10.10, 10.11, and 10.12 beta. Huh?