Click the 'Lock to prevent further changes' button at the bottom-right corner and then hit on 'Turn On Firewall' > 'Firewall Options' tab, it will pop up a new window, in which please add Spotify to the whitelist to allow it incoming connections. Navigate to the 'System Preferences' and choose the 'Security & Privacy' > 'Firewall' button. Just follow the below steps to solve it right now. When Spotify is unable to access to internet, it could be caused by that it's blocked by firewall settings on your computer.

If you followed the first way, but still couldn't fix 'Spotify says no internet connection' issue, you can focus on Firewall settings now. How to Fix Error 4 on Spotify via Firewall Click the OK button to confirm all settings, open Spotify app again and the Spotify error code 4 could disappear. After you have clicked the Use of the following DNS server addresses option, please type the DNS addresses in the boxes, such as Preferred DNS server: 8.8.8.8 or Alternate DNS server: 8.8.4.4. You need to hit on the Properties option in the popup window, where you need to double-click on Internet Protocol Version 4 (TCP/Pv4) or Internet Protocol Version 6 (TCP/Pv6). Under Connections, please click on the primary connection (either WiFi or Ethernet). In the bottom-right corner of the computer desktop, please right click on Network icon and select the Open Network and Sharing Center section. Now, you can relaunch Spotify app to see whether the Spotify offline error code 4 could be fixed well. Just confirm all settings by clicking the Apply > OK button. Touch the DNS tab an click the + button to replace any listed addresses with, or add, the Google IP addresses at the top of the list, like 8.8.8.8/8.8.4.4 for IPv4. In Network settings, please click the Built-In Ethernet to change the settings for an Ethernet connection or choose Airport for a wireless connection. Click the Apple > System Preferences to navigate to Network option and click it. To fix this issue, you'd better to switch from your ISO's to larger DNS services, such as Google DNS, OpenDNS, etc. Sometimes, Spotify app can't recognize your DNS service properly from ISP provider, which leading that Spotify internet error code 4 showed.

When you have met the issue that there is no internet connection on Spotify, the first thing you can do easily is to check your DNS server. How to Fix Spotify Error Code 4 through DNS

Spotify on mac error