Q: com.apple.WebKit.Networking.xpc want to sign using key "Apple ID Authentication (date, time) in your keychain

I think i figured this out; well, at least for me. I was having this problem every time I opened a new tab in Safari, which was incredibly annoying! It was a portal website that I use for work, as you describe, that was causing the issue, and the solution for me was to remove it from my Top Sites section. Once removed, Safari no longer prompted me for this certificate each time a new tab was opened. I hope this helps someone out there!

We experience it with our Exchange-2010 Server when accessing OWA with Safari.

I tried the SSL Settings with IGNORE but it did not help. Only removing the apple-Certificate (com.apple.idms.appleid.prd...) from the key-chain helps for a moment until the certificate is introduced again (wihout asking for permission!)

Any other ideas on how to get rid of this. Of course we could instruct our users to not use iCloud at all.

Rosario

Clearing out sites that use certificates worked for me!!! Many thanks!!!

In our case it comes as soon as you start using iCloud. If you are logged in as an admin, then the certificate (com.apple.idms.appleid.prd...) gets into the keyChain without asking for permission. And Safari tries to use this certificate to access any other web-page you might call. But strangely, if you are logged in with a normal user account, you do not have the problem at all. I guess the keyChain might be locked or in that case the certificate goes into the correct container where it does no harm or where it can be used for iCloud access only. I would have to verify and test this latter case.

Rosario

Same here. There were employer sites in Top Sites that required a VPN to access. When the VPN was disconnected, Safari could not contact them. It proposed a solution (signing) that would not have helped (so you may as well click Deny).

Removing the "unhappy" sites from Top Sites (as Youraveragemo did) partially solved it. But when the number of Top Sites shown (say, 6 or 12) is less than the number of Top Sites known (up to 24), unseen unhappy sites could lurk or creep in later.

Solution: In Safari > Preferences, change the number of Top Sites shown to 24. In History > Top Sites, remove every unhappy site (click its X icon). Pin every "happy" site (click its white pin icon to make it blue). If this leaves fewer than 24 sites, you may need to repeat the process a few times during the next several weeks until 24 Top Sites are pinned and none of them are unhappy.

For general instructions for using Top Sites and Favorites, see this Apple article.

To clarify my previous post: When "Safari > Preferences > General > Safari opens with" is set to "All windows from last session", the error message can appear after I quit and reopen Safari if any page "inside the VPN" tries to refresh when the VPN is not connected. The Top Sites fix does not address this or similar situations. I always click "Deny" because other responses yield no benefit and a very small but nonzero risk.

can anyone guide me here

I'm trying to migrate my wife computer onto Yosemite and I'm trying to remove tons of crap before I send it to Time Machine.
I found that in var/folders there is com.appleWebKit.WebContent+com.apple.Safari that is 12 GB !!!!!

Is it safe for to chuck this or is there a root to this ?

YEs

Using OWA is when it is happening to me. Interestingly, I cannot find the certificate referenced in my list of Certificates so I cannot suppress. Any suggestions?

Just got the message in OS El Capitan. Seems like there wasn't a fix between Yosemite and El Captain.

Yes I just got it. I just updated to os x el capitan 10.11.2. Not sure if its released or not. I clicked "always allow" and its now stopped popping up.

Steve Jobs is trying to Network his C.A.WK. from heaven.

I just got this and I'm running Version 10.9.5...Hackers maybe?

Perhaps hackers?

I just started getting this message after doing a system update today. Yeay. Seems to only pop up when I go to Facebook. Is it ok to select "Always Allow"? Since I'm not sure what it is, I don't know if I should do that.