It looks like audio support is broken on macOS 13. If you’re willing to run some terminal commands, you should be able to work around the issue for now:
- Install Homebrew
- Run
brew install mpvin Terminal and accept any prompts. - Run the command
sudo cp /usr/local/bin/mpv /Applications/Anki.app/Contents/Resources/app_packages/anki_audio/
Issued logged in mpv is broken on macOS 13 · Issue #5040 · ankitects/anki · GitHub