@pokli: Currently, many brokers provide MT4 software specifically for Mac OS, not just for Windows, including brokers FXCM, Pepperstone, RoboForex, IFC Markets, ThikForex, FinFX, Orbex and others.
In this case, an emulator or third-party plugin is required, so you need to first install software that can run Windows-based applications (emulators) on Mac OS such as Wine, Play on Mac and others. After the emulator is installed, you can run Windows-based MT4 on Mac OS.
Thank you