Hi there! I understand you’re trying to click on audio in NaturalReader on your Mac, but the reading audio isn’t playing. Let’s work together to get that sorted out.

To start, can you tell me a bit more? For example, do you see any error messages when you try to play the audio? Also, is this happening with all texts or just specific ones? And have you tried testing other voices or restarting the app?

Meanwhile, here’s a step-by-step guide to some common fixes for audio playback issues on NaturalReader for your Mac OS X 10.15.7:

1. Check your Mac’s audio output:
- Make sure your speakers or headphones are properly connected and turned on.
- Click the volume icon in the menu bar to confirm sound is not muted and the volume is up.

2. Clear the Audio Cache in NaturalReader:
- Open the app and locate the text block where audio does not play.
- Click the Options button (three dots) near that text block.
- Select "Delete Audio Cache."
- Then try clicking Play again. This forces the app to re-convert the audio and often fixes playback glitches.

3. Verify Voice and Language Settings:
- Click the speaker icon or voice settings in the app.
- Ensure you have selected a voice from the available list that matches your text’s language.
- Sometimes selecting a different voice and switching back can help refresh the audio.

4. Restart the NaturalReader app and your Mac:
- Close the app completely (Command + Q).
- Restart your Mac to ensure any temporary issues with system audio services are resolved.
- Reopen NaturalReader and try to play the audio again.

If you tried these and it still doesn’t work, we can dive a bit deeper, like checking for app updates or permissions related to audio access. Also, it would be good to check if this issue occurs in browser mode if you use NaturalReader online, or just the installed app.

Does any of this help? Let me know what you’ve tried so far or if you’d like me to guide you through these steps!