Thank Hilaire , I understand how to wrap my code to a cross platform class. Definetly will look at (have done already previously) DrGeo as most likely I will rely heavily on Morphic.
Nicolai ,I tried this code in Windows and works
DisplayScreen hostWindowSize: 500@500.��
DisplayScreen hostWindowTitle: 'hello'.
Will check it on MacOS when I get home :)
What I want to create is a custom gui that resizes to a small size and locates to the left side of the screen as a long left panel that can be use like a Dock bar for Pharo and Blender, and who knows even for OS stuff.��