MBP i7 - Logic uses only 1 core?

Is there something I need to do in the settings to make use of the second processor in my i7 mbp? I just downloaded the new version and I have been using it all day so far with projects up to 32 tracks and logic has only used one of my processors the whole time. I read about the update causing problem with quad cores but this is just the dual core i7 in a macbook pro. Logic should use both of my cores correct?
Thank you for any help or advice,
Todd

Thank you for the help Blueberry.
I copy and pasted that exact code into terminal. Then I restarted logic. On the CPU/disk meter I still only see 2 cores just like before and only 1 of those cores is used no matter what I do in logic. I notice no difference in performance. Maybe that is only for the quad core i7's and not the MBP dual core i7's ??
On a side note, I'm using a RME fireface UC and I get random pops and clicks with Ivory 2, piano virtual instrument, even with a buffer of 128 samples set. That is with only one track, one instrument loaded up! The 1 cpu core is working hard too. Kinda a bummer considering the is the top of the line right now for apple's laptops. Seems like I downgraded.

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