My mid-2010 macbook pro was running just fine on OS X 10.10, and then I decided to enable the guest account.
My account still works fine, but when I login into the guest account, I get an annoying dialogue box:
OS X wants to use the "Local Items" keychain. Please enter the keychain password.
Because this is the guest account, there is no password. So I don't know what to do to get rid of the box.
I tried following the instructions here, by going to Keychain Access Preferences and resetting the default keychain in the guest account, but it just said "Keychain Not Found."