Tag Archives: macOS

How to unregister Viscosity

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I was helping a colleague of mine set up VPN, with the client Viscosity to be specific, on macOS. During the process of setting it up, we noticed that remains of an old license, from another place, was still there. When she tried connecting to one of our remote servers, she got the following error:

This copy of Viscosity is registered using a license that does not allow connections to one or more of the remote servers for this connection. Please contact your VPN Provider for further details.

Tried searching for options to unregister the old license, but there was nothing visible in the GUI. I finally found a solution though, but it needs to be done in the terminal.

Close Viscosity, open up a terminal, and type:

Then press Enter. Now start Viscosity again, and it should no longer give you that error. If your trial period has ended, you will have to enter a new valid license.

iTerm and alt+backspace

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I recently changed jobs, going from a Linux environment to macOS. When I worked in the terminal in Linux, I got used to using alt+backspace to delete entire words. Unfortunately, it seems that this function isn’t native to the Terminal application that macOS has.

However, in the application iTerm2 it’s possible to add your own key-combinations so that alt+backspace, or in this case cmd+backspace, works as it does in Linux.

Just follow these instructions:

  • Open up iTerm2 and head on over to Preferences
  • Go to Keys -> Key Mappings and press the +.
  • In the Action field, select Send Hex Code.
  • In the field Keyboard Shortcut, just press cmd+backspace.
  • In the field Hex code enter 0x1B 0x08.

And that’s it! cmd+backspace in iTerm2 should now have the same functionality as alt+backspace in Linux!