I've wanted to build an Audio Unit for a while, so I started looking at the current docs, which seem to suggest that I ought to build an app extension, which starts with choosing what kind.
However, on Xcode 10, these choices aren't available. Indeed, it seems that the whole concept has been erased from Xcode, and the only programming guides are seemingly deprecated.
In fact, I often run into situations where the class documentation, which seems to be up to date never the less refers to programming guides which are marked as no longer being updated.
Was there some announcement I missed? It feels like this has been going on for the better part of a couple years.
