Well, if I wasn't confused, I am now.
What do you mean "from Restrictions"? The Apps options within Parental Controls permit you to limit an App. There's no option to limit "in-apps" or no place that I can see it possible for "in-apps ... to be disabled". So you can block a kid from playing a game, but you can't block the game from asking the kid to spend $99 on in game toys — what TradeNations does — and nothing that requires an approval from an adult before that $99 is spent.
This is the control panel:
The "Allow App Store Apps" control is a simple age restriction. And the Allowed Apps is just the apps you permit the kid to use.
Please tell me there's another control panel I'm missing?
No that's my point.
I am NOT talking about a "device." I'm talking about an iMac. The game, Trade Nations, which you can download for free from the App Store, enables in-app purchases — ranging from 99 cents to $99 . If you select any of those — including the $99 — you're asked to confirm your purchase, but there's no password required. And there is no place in SYSTEM PREFERENCES>Parental Controls (again, not SETTINGS>RESTRICTIONS) to block in-App purchases — or so far as I can see. Likewise in iTunes — it too doesn't allow you to block in-app purchases.
Or again, am I just "confused here"?
Thanks for the clarification. This app is one of those truely universal deals. Available not just for all iOS devices, but it seems they ported it to Mac OS X.
You will not see a way to disable In-Apps on parental controls in Mac OS X.
However, they can not make the purchases without logging into the App Store. For this reason, make sure you are NOT logged into the App Store. If you are, you will most likely still be logged in after a reboot by default. Double check this by clicking on the STORE tab.
Assuming your kids don't know your password, they will be stumped when prompted to log into the MAS account when trying to carry out an In-App on your Mac.