how do I get rid of ad.doubleclick.net?

Linc, I followed instructions I found here and forced quite on Safari and then when I re-started Safari, kept my shift key pressed and held and then cleared my history and under privacy "block all sites from storing information on this computer."

I haven't seen the ad.doubleclick.net again, but now I'm getting this message and I am not sure if it's genuine and from Apple or not - it sounds like it's a fix for the problem, do you think? I'm not touching this until I hear from you as this could really cause a problem if it's not. Thank you!

Patricia

com.apple.WebKit.Networking wants to sign in using key “Apple ID Authentication 2013-12-17 13:58:26 GMT-05:00” in your keychain.

Do you want to allow access to this item?

Always Allow Deny Allow

It's malware ...

Force quit Safari using the Command + Option + Esc keyboard shortcut.

Then restart Safari. Download and run Malwarebyyes Anti-Malware for Mac formerly known as AdwareMedic. It's free.

Make sure Mac App Store and identified developers is selected in System Preferences > Security & Privacy > General

If you would rather not download Malwarebytes Anti-Malware, you can remove the malware manually following the instructions here > Remove unwanted adware that displays pop-up ads and graphics on your Mac - Apple Support

It's not malware. Doubleclick is a legitimate, though annoying, ad network. Have you installed any kind of ad-blocking software, or have you modified the hosts file to block ads?