This is a software for DSLR's/mirrorless and other 'Full-fledged' cameras, not webcams. Macbooks do not have an hdmi in, and passing video through usb wasn't a

This is a software for DSLR's/mirrorless and other 'Full-fledged' cameras, not webcams. Macbooks do not have an hdmi in, and passing video through usb wasn't a standard for those cameras until lately (and still isn't). So macbook or windows didn't matter in this case.