A Mac Polytonic Greek keyboard for WASD 104/87-Key US ANSI Layout. Originally based on
wasd-inkscape-104-11.13.2017 from here, and inspired by this layout.
wasd-inkscape-104-11.13.2017-polytonic-greek.svg - Inkscape SVG file for Polytonic Greek before paths-only conversion. You should still be able to edit the text in this file.
wasd-inkscape-104-11.13.2017-polytonic-greek-paths-only.svg - Inkscape SVG file for Polytonic Greek after paths-only conversion. This is the final layout I submitted. Note I also made some other small tweaks after the paths-only conversion (small shifts to positioning, and added media icons on the media button cluster above the arrow keys, and an eject icon on f13).