It's pretty egregious that Apple would have a basic Javascript syntax error on their documentation page like that. The correct syntax is: title = choices['myapp'].title; Another quick note: if you print one of the values in choices, e.g. system.log(choices['myapp']); it will print (null) to the installer log, giving you the false impression that every one of these keys has a null value. This is not the case, and you can still access the values' properties, such as title, visible, selected, etc.

Please disregard. The installation scripts were deactivating an existing kernel extension before activating, hence the extra prompt.

Some corrections (that I unfortunately cannot edit into my original post!) NSRunningApplication.activateWithOptions isn't deprecated, but the option NSApplicationActivateIgnoringOtherApps is. Instead of NSRunningApplication.yieldActivationToApplication I meant NSApplication.yieldActivationToApplication. Instead of NSRunningApplication.activate I meant NSRunningApplication.activateFromApplication. These corrections aside, I'm still looking for an answer to my original main question.