How do i tether my blackberry to my mac?

I'm not sure if this applies to you but as far as I know most phones need you to be using a bill-pay contract with your network to enable tethering as part of your tariff. I'd suggest calling your network provider to see if they support this, as they may not allow you to do this on their network at all. After that I think it should come up in BB desktop manager somewhere, or in the options for internet connection on your mac. hope this helped :)