Does my 2009 iMac have a built in wifi adapter
Going back to your question earlier, Performance Internet with Xfinity Unlimited plan is $39.99/month for the first 12 months with a 2 year contract. After the first 12 months, monthly charges are $59.99/month for months 13-24. After 24 months the regular rate of $94 per month will apply.
iMac, Mac OS X (10.7.2)