Unfortunately, there still seem to be lots of issues in 7.6 for macOS!
glLineWidth still does nothing, like already mentioned in January above. The Draw Mode settings work fine, but GL_LINE, GL_LINE_LOOP, and GL_LINE_STRIP only display a very, very fine line that, depending on the colour, can barely be noticed in the viewport.
A minor bug happens, when double-click the component instead of opening the editor with right-click Edit code…. The Grasshopper keyword search box pops up at the mouse location each and every time.
At first, things work fine when playing with the GL Shader component, but after some time it completely gives up and stops working? It simply doesn’t refresh the Rhino viewport any more and playing with its inputs or internal code does nothing.
And like before the viewport doesn’t get cleared, when you remove the component from the canvas. Rhino needs to be relaunched to get rid of the display.
That’s as far as I went for now.