Now you can Monitoring Your Preview Or Program/Current Scene with Unofficial Tally Lights App For OBS Studio. It will works with any version of OBS Studio (Mac and Windows) with OBS Websocket 4.9 Compact plugin installed and running (Disable Authentication).

The Tally Names based on your Scene Names.

Red for Active, Green for Preview, and Grey for Standby.
Support up to 10 Scenes.

How to use:
Open App and pres 'Setup' to setting the Scene based on your OBS 'Scene' Names, save and connect. Then Choose what tally channel you want to monitoring.


Make sure you are connecting to the same WiFi network, input switcher ip address, and you good to go. for some occasion, you need to disable the gsm/LTE/5G/4G/3G network so no ip conflict.

Thanks and have a great day.