Level 1

40 points

How I solved the Safari 13 and High Sierra problem with idmsa.apple.com unsecure connection (all Apple logins)

Like many other users since February I have encountered the "Safari 13.x - High Sierra" issue related to every Apple login service (iCloud, Apple store, developer.apple.com, Apple communities etc. ).

Here you can read some discussions concerning the issue:

https://discussions.apple.com/thread/251108056?answerId=252098530022&page=2

https://discussions.apple.com/thread/251210686

https://discussions.apple.com/thread/251196415

I tried everything, like them, without success. Then I found a solution that worked form me:

Go on the Apple certificate page:

https://www.apple.com/certificateauthority/

Download the Apple Intermediate Certificates

Apple IST CA 2 - G1 Certificate

Double click the downloaded certificate to install it in Keychain Access.
You should see it now, in login certificates.

Voilà, now Safari should be able to work like usual.

This is what worked for me and I hope for you too. 🙂

Posted on Mar 25, 2020 1:50 AM

Similar questions

45 replies

Landauer

Level 1

8 points

Oct 22, 2020 5:50 PM in response to Taro-71

Thank you so much - this has been driving me crazy. I just hope that I don't have to do it again in May 2022 when the certificate expires because I'll have forgotten what to do by then :)

Nov 4, 2020 9:40 PM in response to Taro-71

Perfect, that helped for me. Thanks!

canegri

Level 1

4 points

Nov 28, 2020 6:06 PM in response to Taro-71

Thank you for posting this fix. It worked for me!

Dec 16, 2020 8:45 AM in response to Taro-71

This worked. Thanks!

Feb 20, 2021 4:14 AM in response to Taro-71

A simple fix - brilliant! Thank you.

Marvin72

Level 1

4 points

Mar 6, 2021 9:20 AM in response to Taro-71

Thank you! Worked perfectly. So glad you posted that. High Sierra, Safari Version 13.1.2 (13609.3.5.1.5).

Mar 29, 2021 3:30 PM in response to Taro-71

This worked for me. Thank you VERY much!!!!

Apr 2, 2021 6:45 AM in response to Taro-71

You make my day. Works perfectly! Thank you!!!

mb10

Level 1

4 points

Apr 26, 2021 4:14 PM in response to Taro-71

I am having this error on iOS 14.5. And no iCloud services are working. Any solution?

Eric Root

Level 10

685,209 points

Apr 29, 2021 7:46 PM in response to mb10

Did you try what was posted in the original post?

jxs42

Level 1

8 points

Mar 28, 2020 8:52 PM in response to Taro-71

thanks! that worked.

I did see the python script to fix the pinning pretty interesting, but already had installed the cert.

so this is due to OS X High Sierra bug of some kind.

thanks again for the help everyone

Mann

Level 1

45 points

Nov 21, 2020 6:15 AM in response to Taro-71

It is really unbelievable impudence, but typical for Apple's arrogance and ignorance, that this problem, about which so many users complain, is not communicated by Apple and they are left alone with the problem.

Thanks to Taro-71 for the solution, which I had to search for a very long time.

Jul 25, 2020 6:25 PM in response to Taro-71

Great, fixed Safari. Thanks. Now to get on with iCloud activities.

Sep 27, 2020 12:19 PM in response to Taro-71

Worked for me too!

Nov 12, 2020 4:31 PM in response to Taro-71

This worked for me. Thank you.

Using macOS High Sierra with Safari 13.1.2 on 2010 17" MacBook Pro.

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How I solved the Safari 13 and High Sierra problem with idmsa.apple.com unsecure connection (all Apple logins)