Hello there…
I just saw the new Mac Mini at Apple store, im wondering if this will work with Unity3D or will happen the same as the old Intel Integrated graphics.
http://store.apple.com/us/browse/home/shop_mac/family/mac_mini/select?mco=MjMzOTQxMTc
Best regards,
It will work fine, the gpu is significantly stronger.
BUT if you have the $200 up to the dedicated one, thats a quantum jump you should really consider 
I’m working on the “old” Mac Mini right now with Unity and some 3D Applications and i do not have any problems withe the integrated graphics.