First download from our downloads page, then copy the Twixl Publisher.app from the disk image to your Applications folder. When opening this app, you will be prompted to install or update the plug-in if it has not been installed yet, or if it needs to be updated. The plug-in will then become available in InDesign from the menu Window -> Extensions.
ABOUT THE AUTOMATIC SYSTEM COMPONENTS CHECK:
Currently – in version 12.0 – there is no automatic check for System Components updates. We intend to reinstate it in a later version.
Double click the Twixl Publisher.exe installer to install the plug-in for all supported versions of InDesign that are installed on your system.
The plug-in will become available in InDesign from the menu Window -> Extensions.