I installed SynfigStudio 1.44-2022-12-25 on my iMac running macOS Ventura version 13.1. The pull down menus (File, Edit, View, etc) will pull down, but when I put my mouse over one of the options, such as New, the line is not highlighted. If I click on New, nothing happens. This makes the application unusable. To quit the app, I have to do option-command-esc and force it to quit. Any help is appreciated!
Hi and welcome here 
It seems there are some incompatibilities between GTK and MacOS 13.
An issue has already been opened about it, maybe you will find some help here: macOS 13 Ventura Can't use pop-up right-click menu · Issue #2976 · synfig/synfig · GitHub
Thank you! I’m glad to know that the arrow keys are a work-around.
Thank you so much! I didn’t know about that workaround until now!