x86_64 Error

Firstly I am really sorry if this has been covered before, and if you just link me to an old thread where this has been covered I would be grateful.

So I have a MacBook Pro I purchased June 2006 running 10.6.8 upgraded from 10.4 yesterday with a clean install)
Processor 2.16GHz Intel Core Duo
Memory 2 GB 667 MHz DDR2 SDRAM

I have the book 'Objective-C for Absolute Beginners' from Apress and have been working through it. When I got into Xcode for the Hello World coding it was automatically set to Debug | i368 where in the book it was Debug | x86_64. When I tried with i368 the Debugger Console didn't pop up, and when I switched to x86_64 I got the error message

"the active architecture x86_64 is 64 bit which is not supported by this cpu"

I am a beginner Mac programmer with some programming experience from uni with Visual Basic 2010. I have a feeling my MacBook Pro is just too old to run the current software and I will need to upgrade. It just sucks as I'm a uni student I can't afford to buy a new computer right now.

I wanted to learn much more about Xcode and Objective C on my VERY old Macbook Pro before deciding I wanted to persue it and then buy a new system.

Can any of you recommend what I should do? If it is just a temporary method to get the Debugger Console to work so I can work through the exercises in the book I would be happy.

Cheers
Jamie

 

Thanks for the reply, sorry for posting in the wrong section.

If I click Run -> Console I get the same screen as the book shows for just clicking Build and Run.

At least I can continue on with the book excercises.