I have a similar problem like another user had and followed all possible steps including reinstalling and cleaning up Keychain etc before.

The first time I start Lync after a reinstall, I can even see a Menu bar for some seconds. But before any window gets rendered, the Crash Reporter opens.

This is what the error said:

Microsoft Error Reporting log version: 2.0

Error Signature: Exception: EXC_BAD_ACCESS Date/Time: 2013-10-30 13:23:14 +0000 Application Name: Microsoft Lync Application Bundle ID: com.microsoft.Lync Application Signature: UCCP Application Version: Crashed Module Name: libcorecrypto.dylib Crashed Module Version: unknown Crashed Module Offset: 0x0002783a Blame Module Name: Microsoft Lync Blame Module Version: Blame Module Offset: 0x002cc862 Application LCID: 1031 Extra app info: Reg=English Loc=0x0407 Crashed thread: 0

Any Ideas how to solve this?




and check in


for additional files with lync or Lync in the name (delete them as well). Then restart Lync.

  • 1
    I have been struggling with persistent Lync/libcorecrypto crashes under my primary account. No crashes under newly created "test" accounts on the host, however. I've googled around for solutions for days. Everyone keeps offering the tired ~/Library/Preferences/ kind of suggestions or digging out certs in Keychain. None worked. Watching fs_usage inspired me to go blast away /var/folders/* in single user mode. BINGO. Joy. – gurple Oct 8 '14 at 18:55
  • I removed all the files (see technet.microsoft.com/en-us/library/jj945448(v=office.14).aspx), rebooted, and removed /var/folders/* as another user, then re-installed Lync and it finally started working again. – tuomassalo Nov 27 '14 at 15:22

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