Choose Indigo 5→Preferences… menu, then make sure the Interfaces tab is selected. This software has always been rock solid only let down by some of the hardware such as X10, now we have Z-wave we have great hardware and software. Connecting X10 RF Interfaces IIDC CCD driver Step-by-Step File Conversion for MacOS Classic Sounds default workspace is wrong directory
USB Drivers (OSX)
Stop the Indigo Server if it is running by choosing the Indigo 5→Stop Server menu item.
"Too many open files" during signing check, while installing more stuff
Choosing an Interface and Modules
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Shorthand Templates (sysout, for,...): You can type "sysout" followed by a ctrl+space (or alt-/) as a shorthand for typing "()".
Stepper RJ45 to DB9 Cable Pinout
If you do not have the required hardware, you can still use the software in offline mode.