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Brown University tn3270 X is a terminal emulation program for connecting to computers which use IBM 3270 terminals. Major features of the emulation include color, extended highlighting, support for different screen and font sizes, and SSL support. Some more obscure features include support for the APL character set, and support for file transfer and remote printing when tn3270 is used with an IBM VM/CMS host.

To use tn3270, the host computer must provide a telnet server which supports the extensions for 3270 terminals. On your Mac, you must be able to connect to the host server using TCP/IP.

What's New

Version 3.4.0:
  • Support for OS X 10.9 Mavericks
  • Experimental support for the tn3270e protocol
  • Experimental support for SSL client certificates


OS X 10.3.9 or later

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Brown University tn3270 X User Discussion

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lamontDakota Member IconReview+194

It's great to reconnect with an old friend!

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Version 3.3b6
Maltz2 Member IconComment+53

FYI - There is a new Universal beta (3.3b6) on the website that will run on Mac OS X 10.7 (Lion)

Reply1 reply
Version 3.2.4

Thanks for pointing that out! I've updated the listing.

bengarland Member IconComment+0

Works great on my iMac with Intel processor. For some reasons none of the versions on the offical Brown site would work... even on my old iBook too... they all kept giving me connection errors with SSH. So I downloaded this beta, and it works!!! Thanks. I don't know why this version isn't on the official site, it should be.

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Version 3.1.7b2
brad stone Member IconComment+0
brad stone

Worked perfectly for my University's mainframe system.

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Version 3.1.1
There are no Ratings for this App yet.
> 5 1


Current Version (3.x)


Downloads 11,528
Version Downloads 468
License Free
Date 10 Nov 2013
Platform OS X / PPC 32 / Intel 32
Price Free
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