AUv2 wrapper not working

[MarkusK1]

It seems that with an XCode update the wrapper does not longer compile at all:

Again_au fails to compile

I messed around for another 2 days and still couldn’t make the AUwrapper work. We get a massive number of customers requesting an AU version. It would be nice if Steinberg could offer some help and take a look at it, since it is clearly a problem of the VST SDK that affects many developers