I clearly underestimated the amount of time it would take to port one of these engines to Mac OS X.
But it's not all bad news, I updated the GLFW header from API version 2.5 to 2.6 and it's now cross-platform, works with Delphi and FreePascal on Windows, Linux and most important Mac OS X. Furthermore, I modified the dglOpenGL header to work correctly with GLFW on Linux and Mac OS X.
I also converted the Mipmaps example from C to Object Pascal.
Take a look at my blog post or download the updated glfw.pas here.