The exporter for Xcode/macOS has a problem setting the AAX library search path correctly. We have the AAX SDK in the project under External/AAX and thats what is set in the jucer file as AAX path. The search path that is created by Projucer goes up one level too much and uses the application folder name. i.e. In our case the generated path is:
…/…/…/APP_FOLDER/External/AAX/Library/Release for instance. This is not a problem that shows up on the machine, where the project file is written by Projucer, but it is a problem on the Jenkins build server, where the directory name is different, so the AAX build fails.