I recommend that you install either one of these newer, beta versions of Anki by downloading the .dmg file and replacing the older version you are currently trying to use. Doing this should fix your issue:
26.05 Beta 1
It should work as-is.
26.05 Beta 2
And then, run this command in the Terminal app which simply renames a directory from “lib” to "libs:
mv /Applications/Anki.app/Contents/Resources/app_packages/anki_audio/lib /Applications/Anki.app/Contents/Resources/app_packages/anki_audio/libs
Beta 2 is the most recent version, but it introduced a small bug that prevents Anki from playing audio. The issue can be fixed by simply renaming a directory. But, if you don’t feel confident using Terminal commands, you can install the slightly-older Beta 1 instead which will work as-is.