Rhino 5 cannot run and shows an error message about “_mcneel._zoo5”.
This problem happens when Rhino 5 runs for the first time after it's been installed.
An unknown installation problem.
Contact McNeel support asking for the license reset tool.
Right-click on the Rhino5LicenseReset.exe and select Run as administrator.
Run Rhino 5.
Use one of the options below: a) If you have a Rhino 5 license and would like to install the license on this computer, click Enter a License and enter your license. b) If you have a Rhino 5 license and the license is installed on the Zoo license server, select Use a Zoo and set the Zoo server name/IP. c) If you don't have a Rhino 5 license and you are evaluating Rhino 5, click Evaluate.