1.  Click and download the tn3270 client from here.

2.  After the client has downloaded it will open the installer.  Move the tn3270 X application from the tn3270 X 3.2.4 image to your Applications folder or whatever other destination you wish.

3.  Double-click the tn3270 X client from the location you have moved it to.

4.  Once the application is open you will be presented with a configuration screen. In the Host Name: field type umshds.colorado.edu as shown below:

5.  Now click the Special icon.

6. Change Port number to 1023. 

7. For the Security option, select SSL, and then under the dropdown for SSL select SSL/TLS Default. 

8. Now click OK.

9.  Next click Open Connection. 

10. You should be shown the default window for the SIS system.  At the top along your toolbar click File and then select Saved Default Settings.

11. A pop-up window will appear asking which settings to save as a default. You can choose to save just the host settings, or you can also save the window position.

Your copy of the tn3270 program will now save all the settings you have put in as the default settings whenever you open the program.  Feel free to add the program to your dock by dragging the application to it, creating an alias to the program, or just opening the program normally.  All these options will open tn3270 with the settings necessary to use the SIS application.