Just FYI: i use Yam Display, too, and I just checked it, because I hadn't since updating Isadora to 4.0.1. It works for me. I'm running Ventura 13 on an M1 Max, Yam 2.4.5. Tried it with newest Izzy and 3.2.6

Hello Peter,

Thank you for using Yam Display and reaching out to us!

Yam Display supports macOS Ventura, so please make sure to download and run the latest version of Yam Display for Mac (v2.4.6.1) from https://www.yamdisplay.com or directly from this link:
https://www.yamdisplay.com/app/YamDisplay2.4.6.1.dmg.

If the issue continues, could you please let us know more information about the issue with Isadora (e.g. the steps to reproduce the issue or any screenshots)?

Thank you!

Best regards,
Yam Display Team

I made all the  updates with the same result. a white screen :( 

best

peter

Hey! 
I would reach out to the developer of Yam Display and or they still support this OS

if that is the case report back to us and we can dive deeper with you.

- Juriaan

yam display

 I can't find any information on the site related to Ventura being supported. The last macOS I see listed anywhere is Catalina.