Im using the Windows IDE.
In github releases, download the firmware.zip.
Oh god thanks 
Omg, another post. Which one should i use with the H7 MT9V034 global shutter sensor? I fear i might brick it if i choose wrong.
OPENMV4.
Does the UVC mode works on macOS ? I want to use it as cam in OpenCV python using macOS
No, only linux. The UVC mode is not the point of the system. The performance is not going to be anything really amazing.
It may work on macOS, you should give it a try and let us know.