I tried to install and launch the current stable version and the dev version of Synfig for the first time (did this Sept 30, 2023, not sure of the Synfig version). When I launched the production app it opened for a half second and then closed. When I launched the dev version it opened and did some set up. When that completed it immediately closed. Attempting to open it again it immediately closed.
I have an M1 Mac, Sonoma 14.0., 8 GB RAM 115 GB available local storage.