New Mac running slow with Logic X

Hi,

I upgraded my Mac to a brand new iMac (Retina 5K, 27-inch, Late 2014). 4 GHz Intel Core i7 processor, 32 Gig Ram, 3 terabit hybrid memory working with apple 27 in monitor attached with thunderbolt cabe. It comes with pre install Yosemite which i update as soon as any update is available. My main DAW on this computer is Logic X, uptodated. But i am haveing problem running Logic x smoothly. It takes long time to start project, some time creating new track takes long time, quite often colored beach ball comes for no reason and stays for exteneded peroiod of time. Once in a while logic crashes by just attemting to create new software instrument track. I appears it is slower then my MBP from 2011 with 8 Gig RAM and one terabit HD. I have done usual tricks like runing Disc permissions, cleaning extra files using Onyx ect. I don't have too many applications runinng on start up.

Any suggestion or remidy for this problem.

moniz