Hi there! I understand you're trying to play songs on the Suno app on your Mac running OS X 10.15.7, but when you hit play, the pause button appears as if the song is playing, yet no sound actually plays. I'd love to help you get this sorted out.

To start, can you tell me if this issue happens with all songs or just specific ones? Also, are you using the Suno app through a web browser or a dedicated app on your Mac?

In the meantime, here are a few initial steps to try that often help with playback issues:

1. Clear Your Browser Cache (if using browser):
Sometimes cached data can interfere with streaming audio. On Safari, go to Safari > Preferences > Privacy > Manage Website Data, then remove data related to Suno or clear all. After that, restart Safari and try playing a song again.

2. Try Incognito or Private Browsing Mode:
Opening Suno in a Private window helps check if browser extensions or saved data cause issues. If it plays normally there, the problem may be with your cached data or extensions.

3. Check Audio Output Settings on Your Mac:
Go to System Preferences > Sound > Output and make sure your desired output device (like internal speakers or headphones) is selected and volume is up.

4. Restart the App or Browser:
Close and reopen the Suno app or browser, and then try playing music again.

If you have done these already or the issue persists, we can look into more technical fixes such as checking network settings, plugins, or potential bugs reported by other users.

Let me know more about your setup or which steps you've tried so far, and we'll dive in further!

Are you currently using the web version or the app on your Mac?