Installing and configuring 3270 Terminal emulator in Mac

Step 1. Download 3270 client for MAC OSX

Download tn3270 from here – . When I’m writing this article the latest version of tn3270 is 3.3b6 (beta). It worked perfectly in my 2012(mid) Macbook pro Retina display.

Step 2. Mount the dmg and open the disk in finder.

Screen Shot 2012-11-29 at 7.46.32 PM

Step 3. Copy tn3270x Application file to your applications folder

Step 4. Invoke tn3270x by double clicking on the application

Screen Shot 2012-11-29 at 7.50.15 PM

Fill your hostname on “Host Name” field. By default the port will be 23, but if you want you can change the port number by clicking on “Special” Button

Screen Shot 2012-11-29 at 7.52.40 PM

Once you are done with your settings, click on “open connection” Button.

Screen Shot 2012-11-29 at 7.55.50 PM

I have used Fandezhi/efglobe mainframe, it is a free mainframe and can be used for your skills development. If you want to know more about creating an id, visit my post about getting a free mainframe id (

That’s it; you know how to go from here J Hey guys, if this post helped you, subscribe for my posts, share it or like my Facebook page.

Cheers –Shibu-



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