1. Make sure that you have installed Tails using either:

  2. Make sure that you have verified your download of Tails.

  3. Make sure that you are running the latest version of macOS.

  4. Make sure that you have verified your download.

  5. Try installing again on the same USB stick.

  6. Try installing on a different USB stick.

  7. Try using the same USB stick to start on a different computer.