how do i get wi fi

[ichiriki]

I'm trying to upgrade my iphone to iOS 7.0.2 but I'm having problems.  I have the Software Update page on my phone but where do I go from there??  It says that I require a WI-Fi connection in order to

complete the upgrade.  Where do I find the connection on my iMac??

Thanks for any help you can provide.  

[NFtoBC]

Would updating through iTunes be simpler? Just connect your phone to a USB port on your Mac, and start iTunes, then select the phone, and check for updates.