Yeah I just ran an adobe update and then tried again and it worked fine for me so all up and running now.... think I prefer resolve though but haven't had a lot of time to play with speed grade yet.
Well I think I just fixed it. I'm on a new MacBook Pro, non-retina model. In the energy saver preferences, I turned off 'Automatic Graphics Switching'. I noticed before that my display would act strange. Once I unchecked that box, Speedgrade opened almost instantly.