Long story, but I was having some problems with Bonjour and couldn't get my printers or TiVo to show up via Bonjour...I changed some settings (I, unfortunately, don't remember which ones.) Then my iMac couldn't get on the internet at all. I did some Google searching (on my iPad) and found out that if I add 18.104.22.168 to my DNS servers, it might start working. Chrome did start working, but nothing else on my iMac does. However, every other internet capable device in my house does go on the internet. I've tried everything I could possibly find and to no avail. If you have any suggestions, it would be a lifesaver for me.