Pods/LIFXKit/LIFXKit/Classes-Common/LXProtocolMessages.h:17:48: Auto property synthesis will not synthesize property 'payload'; it will be implemented by its superclass, use @dynamic to acknowledge intention
I had to go through my own code as well after upgrading, to fix a few cases of this issue. Basically, any time a subclass redeclares a property with a different type (a common pattern I used as well) you'll get a compiler warning now.