I recently sold an old iMac and would like to know what, if anything, I need to do to cut my connection to the computer in terms of registration. I cleaned the hard drive, so the new owner will not have access to my information, but I registered the machine and all the software in my name when I first got it. What happens if the new owner conducts questionable activities on it? Will the IP address be traceable to me still? Thanks to anyone with insight on this.