Eapolclient keychain errors?

Hi, need help with something I've never seen before. My new macbook keeps getting this error window, " eapolclient wants to sign using key "mix..." (.Mac Sharing Key) 06/12/28 22:41:56 GMT+01:00" in your keychain. Allow always, Deny, Allow. No matter what key I hit, it pops up all the time. What is this and how can I get rid of it without messing anything up? Very annoying. Many thanks in advance.