Xemu MEGA65 Emulator Native macOS UI Demo

This is a demo of the macOS native UI I've implemented for the Xemu multisystem emulator project (here running the MEGA65 system emulator). It is using low overhead calls to the Objective-C runtime. System is macOS Catalina. Find xemu at https://github.com/lgblgblgb/xemu MEGA65 project: https://github.com/lgblgblgb/xemu