Change settings on mac for applications that open on starting your computer

To see what you are writing properly in terminal you will need additional enable the Local Echo.

After Clicking on options a new window will open, Scan for ports using button “ReScan Serial Ports” once you get the COM port set the: Now open the CoolTerm Applications by clicking on its icon and then go to Connection menu -> Opitons. Drag the CoolTermMac folder from Downloads folder to Applications folder and CoolTerm icon will appear on the Launchpad automatically.