Cocos2d-x v4.0 has been released with Metal support on iOS/macOS. As announced on the Cocos forum, developers that want to use Metal should upgrade to this version.
Other features include:
- Support for Metal on iOS/macOS
- Use CMake for all platforms
- Update GLFW to 3.3
- Update minizip to 1.2
- Remove deprecated functions
- Remove H5 engine and JSB
- Remove TIFF
- Remove SimpleAudioEngine
- And various fixes
An upgrade guide is also available here.