My first guess is you are using OS High Sierra, which is several OS's ago. However, you did say it was working for a little while, so I don't know the answer. Did you check minimum requirements for OBS? Are you using a current OBS? If you're not current you may not be able to use certain filters and software they have created. If it's the beta version I have had problems where it won't let me do anything out of safe mode. I am using OS Ventura and OBS 29.1.3. Good luck!Thanks Babs
I did it. It worked but few hours later it diseapeard again !
There must be a problem,
Macmini, High Sierra.