Download dfine.io Studio
One app for Apple Silicon and Intel, macOS 13 or newer.

How it is laid out
The preview at the top shows what goes out. Below it sit three panels:- Sources lists seven fixed sources. Click a row to put that source on air. The gear on a row opens its setup.
- Audio Mixer shows the levels, with Auto-stop beside it.
- Stream holds the destination, the stream key and Start Streaming. While the Playout row is on air, this panel turns into Playout.
The sources
A row that cannot run on this Mac reads Not available on this Mac, for example SDI/HDMI IN without the Blackmagic Desktop Video driver.