Hi @Craigson. Nothing looks wrong to me…what version of OF are you using? I just finished a project on 0.9.3 and multi-screen fullscreen was working for me. I was using a slightly different syntax which may make a difference?
Note that I was calling ofSetFullscreen(true) inside ofApp::setup(), but I would think doing either window_sp->setFullscreen(true) like you are or settings.windowMode = OF_FULLSCREEN should work as well.
Thanks for the response. I’m using the 0.9.3 release. I’ll try moving the setFullScreen() method to setup when im back at my laptop. Anything special i should be doing with the display settings in OSX? Currently set to extended, should they be mirrored?