Microsoft Teams (New) Crashing at Launch on macOS - DYLD Library Missing / Code Signature Violation (OneAuth.framework)

Abid 20 Reputation points
2026-06-07T01:49:22.35+00:00

Hi Microsoft Community,

I am experiencing a persistent crash issue with the new Microsoft Teams on my Mac. The application refuses to open and crashes immediately upon launch, even though I have updated both macOS and Microsoft Teams to their latest versions.

Here are my environment details:

Device: MacBook Pro (M1, 2020)

OS Version: macOS 15.x / Latest update

Teams Version: 26120.3106.4725.800 (com.microsoft.teams2)

What I have tried so far:

Fully updated macOS and Microsoft Teams.

Restarted the system multiple times.

Clean reinstall of Microsoft Teams.

Analysis from the Crash Log: Looking at the crash report, the issue seems to be related to the dynamic linker (dyld) failing to load the authentication framework due to a code signature policy violation, specifically pointing to OneAuth.framework:

  • Exception Type: EXC_CRASH (SIGABRT)
  • Termination Reason: Namespace DYLD, Code 1, Library missing
  • Failure Detail: Library not loaded: @``[Moderator note: Personally Identifiable Information removed]``/OneAuth.framework/Versions/A/OneAuth Reason: .../OneAuth.framework/Versions/A/OneAuth not valid for use in process: Process violates library's library load constraint
  • Note: System Integrity Protection (SIP) is currently disabled on this machine for development workflow purposes.

Below is the complete crash log for reference: MSTeams quit unexpectedly.txt

Has anyone encountered this specific OneAuth.framework signature constraint issue on Apple Silicon? Are there any specific terminal commands, cache clearing methods, or provisioning profile updates needed to resolve this library validation error?

Any guidance or workarounds would be highly appreciated.

Thank you!

Microsoft Teams | Microsoft Teams for business | Teams for Mac
0 comments
Answer accepted by question author
Vivian-HT 17,895 Reputation points Microsoft External Staff Moderator
2026-06-07T02:38:44.02+00:00

Dear @Abid

Thank you for sharing such a detailed analysis. I completely understand how frustrating it is when Teams crashes immediately after launch, especially after you’ve already tried updates and reinstalls.

In this case, firstly, I recommend you try clearing Teams cache. This ensures that any cached or mismatched framework data is cleared. For more information and instructions, please refer to this Microsoft Official Guide here: Clear the Teams client cache

However, if the issue still persists, since this issue is likely related to a deeper compatibility or code-signing validation problem within the Teams client on macOS, therefore, I recommend you escalate this to Microsoft’s support team so they can investigate using internal diagnostics and engineering tools.

If you are using a work or school account and you have Global Admin permission, you can create a support request directly from the Microsoft 365 Admin Center by following these steps in this article: Get support for Microsoft 365 for business

If you don’t currently have admin access, I recommend reaching out to your Microsoft 365 administrator or IT team and asking them to submit the ticket on your behalf. For reference: How do I find my Microsoft 365 admin?

Note: Please understand that as a forum moderator, my role is to provide general guidance and troubleshooting support. I don’t have access to internal systems or backend tools, and I appreciate your understanding of these limits.

I hope the information shared helps point you in the right direction. Thank you for your patience and understanding. I'm looking forward to your update.

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