Substance Plugin for Maya 2018 failed to load

Hi!

After installing the Substance plugin in Maya 2018.7/Arnold v4021 in my OSX 10136, I am having this error:

// Error: file: /Applications/Autodesk/maya2018/Maya.app/Contents/scripts/others/pluginWin.mel line 290: initializePlugin function failed (substancemaya) // 

Despite this, once in Hypershade/Create(2D textures/Substance Node
Maya just crashes... EVERYTIME!
 
Thanks for ANY help!

LAO