Following on from a previous thread, I've found the BaseElements plugin won't install from the following script:
If [ Get ( SystemPlatform )= -2 ]
Install Plug-In File [ Home::Plugin_BE_PC_64 ]
Else If [ Get ( SystemPlatform )= 1 ]
Install Plug-In File [ Home::Plugin_BE_mac ]
using Windows 7 running on Parallels 13 on a 2017 MacBook Pro. I have confirmed that the BE folder file is definitely in a container field of the Runtime solution.