Question: I just got a new Macbook Pro. I know it's an Intel processor, but is it 32 bits or 64 bits processor?

Answer: 
64bit processor
Enter this into Terminal: 

```
uname -a

```

If you see

`x86_64` 

at the end of the string returned , your OS X kernel suports 64 bit.

Also bear in mind you need to hold down the `6` and `4` keys while booting to startup with the 64 bit kernel ( there are other ways to accomplish this as well ) 

At least this was the case on recent Macs - I assume the new MacBook Pros released in April 2010 still boot by default into 32 bit mode as well.