Lync for Mac Crash upon Startup - EXC_BAD_ACCESS

Question

I am receiving the following error when attempting to launch Lync on my Mac
Stats:
OS X 10.9.1
Lync 2011 14.0.7
Microsoft Error Reporting log version: 2.0
Error Signature:
Exception: EXC_BAD_ACCESS
Date/Time: 2014-01-23 17:21:02 +0000
Application Name: Microsoft Lync
Application Bundle ID: com.microsoft.Lync
Application Signature: UCCP
Application Version: 14.0.7.131205
Crashed Module Name: libobjc.A.dylib
Crashed Module Version: unknown
Crashed Module Offset: 0x000044a7
Blame Module Name: Microsoft Lync
Blame Module Version: 14.0.7.131205
Blame Module Offset: 0x002cd7ab
Application LCID: 1033
Extra app info: Reg=English Loc=0x0409
Crashed thread: 0
I have tried EVERY idea/suggestion/reply I've been able to track down - without success.
Removed the 'unknown' entry in KeyChain (there was not one, but I checked)
Removed the OC_..... KeyChain entry
Removed the Application entirely (including Log, ByHost, Preferences, etc)
Reinstalled the Application and updates.
Have performed both 'Verify Disk', 'Verify Disk Permissions' and 'Repair Disk Permissions', 
All variety of fixes/combinations still result in immediate crash.  The Application does not even show up - just straight crashes.
I have Office for Mac installed as well (running fine).
Any help/suggestions are greatly appreciated.

Answer 1

Hi,
It seems to be a known issue about Lync 14.0.7 version. You can try to uninstall Lync client with the help of the link below and then install Lync 14.0.6 manually on Mac to have a test:
http://technet.microsoft.com/en-us/library/jj945448%28v=office.14%29.aspx
Here is a similar case may help you:
http://social.technet.microsoft.com/Forums/lync/en-US/1ea7487f-5ded-4713-93c8-1abd594aea74/lync-for-mac-2011-crashing-since-update-to-1407?forum=ocsclients
Best Regards,
Eason Huang
Eason Huang
TechNet Community Support