This error is coming from your operating system (not Vectorworks itself) and normally indicates that the you don't have read/write access to your Vectorworks folder.


Please follow the steps below:

  1. Quit Vectorworks.
  2. In your Application folder, right click on the Vectorworks 2017 folder and choose "Get Info"
  3. Set the permissions so that each listed user (System, YourUsername, etc) is allowed to Read and Write.
  4. Then, click the lock at the bottom right, unlock it with your admin password if prompted
  5. Click the gear and choose "Apply to enclosed items" like so, it may take a few moments to finish:


6. Reboot your machine, then restart Vectorworks and try installing the libraries,


This permission adjustment normally fixes this error, errors within the Package Manager, and/or failure to download the updates to the packages when the application first launches.