Here's how in only a few steps!
I made this particular Instructables using a sonar sensor (XL Max Sonar EZ/AE) but you can do it with any data values that are separated in arduino by a carriage return and a line break:
To put it simply, the incoming sensor data should look like this in the Arduino Serial Monitor:
Separated by a newLine.
I made it at TechShop. !
Step 1: Get CoolTerm
Download it at : http://www.macupdate.com/app/mac/31352/coolterm.