Comment 10 for bug 1630676

Oh, forgot to add:

For option 1, it's important that the paths in the spinit file are relative. I don't know if ngspice supports relative paths for codemodels in its spinit file. (An app bundle on OSX can be moved around freely by the user.)

I think the best is probably option 2, require the user to install ngspice. It could even allow to open the download page URL for ngspice if user tries to run simulator without it finding ngspice.