SecurityAgent hangs when authorizing changes to Certificate Trust Settings

This has been plaguing me forever. Glad I'm not the only one, but disappointed that this still hasn't been fixed. I submitted a dev ticket for this, but it's been open for a year. Hoping el capitan addresses this in some form.

I do have the same problem, even with the latest OS X 10.10.1, and only with Microsoft Remote Desktop. It is extreamly annoying is I need to perform a reboot in order to fix it.

I had this happen (again) to me earlier today. For me, this happens when working in Safari doing web development. Today when it happened, however, SecurityAgent didn't appear in activity monitor at all. So, in case anyone else runs into the same problem, I thought I'd add my solution here.

I opened terminal and ran:

ps -A | grep SecurityAgent

got the process number from that and ran:

kill <process number>

Had to do that twice.

Glad to see someone submitted a bug report. I'm going to do it too just to up the number of votes on this issue.

Just ran into the exact same problem. Problems that cause you to completely lose control of your entire system should not still be happening in 2015. I had to SSH in from another machine and force the machine to reboot.

Someone needs to be fired for this.

It's still an issue in 10.10.5 :-( Thanx for the tip about killing SecurityAgent from a terminal... that sure beats forcefully powering down the computer by holding the power button (which I had to as everything slowly starts being unresponsive once the security agent hangs). I really hope Apple fixes this in 10.11. Even Windows (7/8/10) doesn't have any bugs as annoying as this one...

Hi, I have exactly the same issue in both Yosemite and Mavericks. It has been happening for more than a year (mostly when using the MS RDP client).

Thanks for the process kill tip - it saves rebooting.

I am having the same issues with a local mac server and a fantastical 2 client -- ALWAYS fails when an attempt is made to trust it using the dialog boxes after the 'Show Certificate' button is pressed.

Thanks for pursuing this!

All those that encountered this problem MUST raise a bug report on https://bugreport.apple.com/problem/viewproblem where you would include a link to this thread and eventually reffer to existing bug report 22876535

Only if they will get enough reports they will act on solving this really annoying bug.

The 10.11 (El Capitan) general release hasn't resolved this issue for me. I really wish it had! I too started seeing it during the 10.10.n days and don't have to deal with this hang often, but it's completely disruptive when it happens.

I have found a solution to this, well it worked for me:

Different versions of the certificate I was trying to install already existed in the keychain, expired / old issues etc. After removing these old certificates using Keychain Access (Utilities folder in Applications) the certificate installed and didn't hang anything.

Hope this helps someone.

This is still with us, both 10.10 and 10.11 latest build (different machines).

I have re-submitted a bug report under 23513211 as 22876535 has been removed 😟

Still happening in 10.11.3.

Same problem here.. It's a shame Apple takes this long to even look at such a big issue like this..

Reported again, bug #24740976

Also reported again, # 24896024

I'm having this issue with the latest version of El Capitan also.

I wanted to add that the regular "kill" or "killall" solution did not work for me, but changing that to "sudo killall -9 SecurityAgent" did. -9 is like using "force quit".