I’m new to AUv3 plugins and am starting with the AUv3Synth example. I can build it under OSX 10.11.6 with XCode 8.2.1 with Juce 5.2.0 and launch the container app OK. I understand this registers the audio extension, but it does not appear as an instrument in Logic Pro X 10.3.2. Am I missing something e.g. do I need to sign it?