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Basic Attestation User Root CA Keychain Mac OS Bigsur (macbook pro nov 2020)

Hi everyone,

I'm currently looking at my keychain (login) and found a Intermediary Certificate. It's called Basic Attestation User Sub CA1 (not trusted)

Organisation: Apple Inc.

State/Provence: California

Normal name: Basic Attestation User Root CA

Organisation: Apple Inc.

State/Provence: California

it seems very weird to me that the MB shows that this certificate is not trusted, as it seems that it's from Apple. The Certificate is valid until march 2032. Does anyone know what this certificate means, what it does. It's the only certificate that's not trusted. Do i have to remove this?

Thanks in advance.

MacBook Pro 13″, macOS 11.0

Posted on Jan 20, 2021 10:02 AM

Best reply

lxhunter

Level 1

14 points

Posted on Jan 25, 2021 2:23 PM

I have something maybe related.

I have just started seeing a check/circle beside each (I have 100's) email in my contacts.

Clicking on it shows;

"Basic Attestation User Sub CA1"

"Expires: Sunday, March 21, 2032 at 8:00:00 PM Eastern Daylight Time"

""Basic Attestation User Sub CA1" certificate is not trusted"

"Organization: Apple Inc."

I called Apple Support and they checked with Engineering.

Engineering thought may be a certificate I created for secure email or something like that.

But is not.

The case is still open with Apple.

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38 replies

Feb 2, 2021 12:55 PM in response to lxhunter

Same problem here in Germany on my MBPro M1 2020

Any solutions? macOS bug?

lxhunter

Level 1

14 points

Feb 2, 2021 1:12 PM in response to sebastianbuggle

Yesterday updated to 11.2 (20D64).

And then ran another Capture_Data.dmg again and sent Apple support a large file for Apple Engineering to look at.

Will report when I hear back.

Feb 2, 2021 8:21 PM in response to lxhunter

Problem is still there? I noticed it after 11.2 Update

lxhunter

Level 1

14 points

Feb 2, 2021 8:29 PM in response to sebastianbuggle

Problem was there in 11.1 and still there in 11.2

Feb 2, 2021 9:59 PM in response to lxhunter

Ok i think its a bug!

Feb 2, 2021 10:05 PM in response to lxhunter

So you have an m1 .Mac? My wife has intel and this does not occur on her machine

lxhunter

Level 1

14 points

Feb 3, 2021 6:04 AM in response to sebastianbuggle

On a Mac mini M1.

Interesting that it is not happening on Intel.

Feb 3, 2021 10:13 AM in response to lxhunter

I am also in talks with Apple Support Germany they are researching the problem

lxhunter

Level 1

14 points

Feb 3, 2021 10:39 AM in response to sebastianbuggle

Thanks for letting me know. Just sent an email to my Apple support contact so maybe Apple engineering can co-ordinate rather that have 2 groups researching the issue.