This new version of Siril is potentially great. I saw a demo by Nico Carver (Nebula Photos) and wanted to try. I have an intel based MacBook pro (2019) running Monterey (and and problems running Ventura so downgraded the OS). It has been running 1.0.6 well. 1.2.0-beta was also running well, but then I found some of the drop down menus were not fully operating. The Image processing menu seemed good, but the scripts men stopped at the image window. I saw a similar problem with the viewing menu at the bottom (linear, vs auto-stretch etc). In that case on the top two lines of the menu appeared when I clicked on them. Finally, when I attempted star removal using starnet++, I got only a small window that showed the top parts of the star and mask histogram.
Good luck. Thanks again.