WWDC26: Find and fix performance issues in your Metal games | Apple
Apple's macOS 27 adds metalperftrace and look-back trace collection to diagnose Metal game performance over long sessions.
“Now you get structured output that can be easily fed into scripts for regression testing, or AI agents to automatically triage potential performance issues.”
Apple's WWDC26 session introduces new Metal game performance tooling in macOS 27, including the metalperftrace CLI and look-back trace collection that lets developers retroactively capture hours of GPU/FPS/memory metrics. The only AI angle is a passing note that JSON output can feed AI agents to auto-triage performance issues, making this primarily a graphics developer-tooling update with minimal AI industry signal.