Dear Apple Developer Support, I am experiencing a critical issue with Developer ID certificates issued for Turkish (C=TR) developer accounts that prevents code signing on macOS. Issue Summary All Turkish Developer ID certificates issued on October 4, 2025, contain an Apple proprietary extension (OID 1.2.840.113635.100.6.1.13) marked as "critical" that both OpenSSL and codesign cannot handle. Technical Details Team ID: 4B529G53AG Certificate Country: TR (Turkey) Issue Date: October 4, 2025 macOS Version: 15.6.1 (24G90) Problematic Extension OID: 1.2.840.113635.100.6.1.13 (marked as critical) Evidence I have verified this issue across THREE different Turkish Developer ID certificates: Serial: 21F90A51423BA96F74F23629AD48C4B1 Serial: 461CBAF05C9EDE6E Serial: 184B6C2222DB76A376C248EC1E5A9575 All three certificates contain the same critical extension. Error Messages OpenSSL: error 34 at 0 depth lookup: unhandled critical extension Codesign: unable to build chain to self-signed root for signer errSecInternalComponent Comparison with Working Certificate My previous Developer ID certificate from Singapore (before revocation) worked perfectly and did NOT contain this critical extension. This confirms the issue is specific to Turkish certificates. Impact Cannot sign applications for distribution, which blocks: DMG signing for distribution Notarization process App distribution to users Questions What is the purpose of OID 1.2.840.113635.100.6.1.13? Why is it marked as critical only for Turkish certificates? Is this related to Turkish regulatory requirements? Can you issue a certificate without this critical extension? Is there a macOS update planned to support this extension? Request Please either: Issue a Developer ID certificate without the critical extension OID 1.2.840.113635.100.6.1.13 Provide a workaround for signing with current Turkish certificates Update the codesign tool to handle this extension This appears to be a systematic issue affecting all Turkish developers as of October 2025. Thank you for your urgent attention to this matter. Best regards,