I was reading a old MacAddict, and I saw a way to change the interface style of an app to the old NeXTStep style, by adding the this line
in the Preference file of the app. But it did not work, any help?
As you have discovered, this no longer works (as of circa Public Beta…) – FinlayDobbie
Besides, all you would do Josha, is piss off your users by changing it every time they launch your app.
It looked something like this http://www120.pair.com/mccarthy/nextstep/intro.htmld/mailActive.gif