Hi guys! I am starting with Apple programming (i did many years of Visual studio programming on PC); and would love to know if is posible to call an app from another app. This is the scenario: 3rd party app that has to be called; i can't modify it so i can simply call it form another app; and the app that call the second app, should work as "gatekeeper", checking if this application can be launched or not (if the user has username and password he will go in, otherwise it will not be able to load the second app). All this came up because i have to limit the amount of time that other people spend on my computer, so i have to limit the games with a user and pwd (that i will change often), and limit the access also to other apps, so i can keep an eye on what is launched on my mac Sounds stupid but is an issue, and there is no commercial app that let me do this....some sort of parental control thing, that's what i really need It would be interesting to make this app, and since i am a beginner on xcode and objC, would love to know if someone can help me in this task. Thanks guys!