MacOS:
You will need to first launch the installer .dmg file, which will open a volume called “Vectorworks 2023 Installer” in your finder.
From the Mac Terminal, type in the following command:
sudo /Volumes/Vectorworks\ 2023\ Installer/Vectorworks\ 2023\ Installer.app/Contents/Resources/installer/Install\ Vectorworks2023.app/Contents/MacOS/installbuilder.sh --unattendedmodeui none --mode unattended --Serial EJMUSN-XXXXXX-XXXXXX-XXXXXX --installdir <install directory goes here, usually "/Applications/Vectorworks 2023"> --sysUsername <the system user for which Vectorworks is being installed> --LDFChoice licenseID
Just in case it saves anyone else the trouble it caused me, the installation directory is written incorrectly.
<install directory goes here, usually "/Applications/Vectorworks 2023">
should be
<install directory goes here, usually "/Applications/Vectorworks\ 2023">
The space wasn’t escaped properly, and the command won’t process because of it. I did remove the <“”>, but I wasn’t paying enough attention to everything else.