If you recently upgraded to Mac OS X High Sierra (10.13.1), you may not be able to connect to the Internet (over Wi-Fi or Ethernet) including unable to browse web pages or open the App Store. Additionally, your Mac will display “ green ” in System Preferences and show a connected Wi-Fi signal indicating you have a network connection
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Can't connect to Adobe.com online service
Troubleshoot connecting your Mac to the internet - Apple Troubleshoot connecting your Mac to the internet. If you can’t connect your Mac to the internet, try the following suggestions. Wait a moment, then try again. Your ISP may be having problems. If you continue to have problems, contact your ISP. Open Network preferences and check the status of your network connection services, such as Ethernet