On a Mac, download the latest 4.2 all-in-one squeak.
Put the following into a workspace and "do it".
I get Error: External function failed. The offending method is #beginFrame.
I'm using an Intel Mac, Mac OS X 10.6.8. Doing the same code with Cog doesn't seem to show the errors.
L
(Installer repository: 'http://source.squeak.org/FFI') install: 'FFI-Pools'; install: 'FFI-Kernel'; install: 'FFI-Tests'.
(Installer repository: 'http://www.squeaksource.com/CroquetGL') install: '3DTransform'; install: 'OpenGL-Pools'; install: 'OpenGL-Core'.
OpenGL example.