stuck Stuck on ModelManager

[Moddwyn16MC]

so i installed the Extreme 1.8 Megabuck modpack, and then when i installed it it opens the window and start constructing the mods, but it gets stuck on the "Reloading- ModelManager":

 

 

[jumpandshootbeef]

so i installed the Extreme 1.8 Megabuck modpack, and then when i installed it it opens the window and start constructing the mods, but it gets stuck on the "Reloading- ModelManager":

 

 

you use apple, can't help ya. Don't know the protocols and processing methods of apple. Try updating any drivers of graphics related programs