Safari (macOS) does not play sound for web push notification I enabled notifications for slack.com in Safari to get push notifications for new messages. However, I don't get any sound with those notifications. The just appear in the top right corner of the screen, but the Mac does not play any sound. 

I am using Safari 11.1.1 in macOS 10.13.5. 

Any ideas?
The setting in System Preferences → Notifications → Safari for ‘Play sound for notifications’ allows sounds to be played for notifications.



It's then up to the website to decide to provide a sound for Safari to play on a notification.

You can configure this for Slack in your preferences on slack.com.