"getParameter of undefined at _glGetString" error appeared in Chrome

@david
That is it. You need to enable hardware acceleration in chrome. It’s under Settings > System > Use hardware acceleration when available

It’s on, but the Mac I’m working on here is a bit old (2011), my guess is that it encountered too many errors and so considered at some point that OpenGL was not available.

Another settings that you can try is enabling WebGL Draft extensions under chrome://flags. And try updating Chrome again.