1. Download the Cisco AnyConnect software : 

AnyConnect Download

  1. Mount the DMG-file and double-click on AnyConnect.pkg.
Explanatory screenshot to the previous description
Opened installationsprogramm
  1. The installation will be startet. Please click on Continue.
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First installation step 
  1. Please read the license agreement and accept it with Continue and then Agree
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Second installation step
  1. Uncheck all packages but VPN and then click on Continue 
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Just select VPN
  1. Click on Install to start the Installation.
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Start the installation
  1. After successful installation, please click on Close.
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Successful installation
  1. In the Finder look for AnyConnect under Applications/Cisco and start it by double-klicking on the AnyConnect-Icon:  
Explanatory screenshot to the previous description
Start Cisco AnyConnect
  1. Enter the name of the VPN-Gateway: vpn2.zih.tu-dresden.de. Then click on Connect.
Explanatory screenshot to the previous description
Fill out the VPN Address
  1. Type in your ZIH login User@tu-dresden.de in the Username field (with tu-dresden.de as VPN group). In the Password field type in your ZIH password. Please click on OK then. You may use a different Group instead Group: "A-Tunnel-TU-Networks" for tunneling. here you find an explanation for this.
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Enter your login information 
  1. After creating the VPN connection, you'll be assigned an IP address from within the regarding TU Dresden network. You'll find a lock symbol in the menubar.
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Lock symbol in menubar
  1. To close the VPN connection, click on the symbol in the menubar and click on Disconnect.
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Disconnect VPN
  1. With MacOS High Sierra (10.13 and later) you need to enable the AnyConnect software extension on the Security & Privacy Pane in System Preferences:
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Allow Cisco in Systempreferences