Hello @Dmytro,
Thank you for posting your query on Microsoft Q&A.
Understood that you are experiencing issues with Microsoft SSO for Mac hanging during registration in Intune.
There could be a few reasons for this,
· Ensure there are no conflicting URLs in your Platform SSO configuration profile. Removing unnecessary URLs, particularly those based in the US and CN, has it can help on solving the issue.
· Please ensure that Conditional Access with MFA is enabled for your Azure P1 subscription.
· Double-check that all the steps for configuring Platform SSO for macOS devices in Intune have been followed correctly. Please refer this document: https://learn.microsoft.com/en-us/mem/intune/configuration/platform-sso-macos
Additionally, please review the Microsoft SSO for Mac logs to identify any specific error messages that could be causing the issue. This might give us a better understanding of what's going wrong during the registration process and from that we can help on resolution.
Please refer this link for known issues and troubleshooting https://learn.microsoft.com/en-us/entra/identity/devices/troubleshoot-macos-platform-single-sign-on-extension?tabs=macOS14
I hope this information is helpful. Please feel free to reach out if you have any further questions. If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".