I updated my Lync for Mac 2011 and I haven't been able to log in since.  If I delete Lync and reinstall without the latest update (14.0.1) then at least I can see Lync but I can't log in.  It says "Lync was unable to sing in. Please verify your logon credentials and try again.  If the problem continues, please contact your support team."  We are on Office365 in our office and I'm the only one that seems to be missing my certificate in the keychain.  Everyone else is having no problem with Lync.

If I run the update (to 14.0.7) then Lync doesn't even open (this is reproducable every time I do this uninstall, reinstall, update sequence), I just get a big fail window that says the following:

Process:         Microsoft Lync [86015]
Path:            /Applications/Microsoft Lync.app/Contents/MacOS/Microsoft Lync
Identifier:      com.microsoft.Lync
Version:         ???
Build Info:      Unknown-131205~0
Code Type:       X86 (Native)
Parent Process:  launchd [176]
Responsible:     Microsoft Lync [86015]
User ID:         502

Date/Time:       2013-12-20 09:23:55.154 -0800
OS Version:      Mac OS X 10.9.1 (13B42)
Report Version:  11
Anonymous UUID:  AC53DD12-73A6-8DE3-FA1C-8B53636E08C5

Sleep/Wake UUID: 88EA8EF0-4BC9-4D66-B8CD-76B3BA39FBFE

Crashed Thread:  0

Exception Type:  EXC_BREAKPOINT (SIGTRAP)
Exception Codes: 0x0000000000000002, 0x0000000000000000

Application Specific Information:
dyld: launch, loading dependent libraries

Dyld Error Message:
  Library not loaded: @executable_path/../Frameworks/USBHidWrapper.framework/Versions/14/USBHidWrapper
  Referenced from: /Applications/Microsoft Lync.app/Contents/MacOS/Microsoft Lync
  Reason: image not found

Binary Images:
0x8fec2000 - 0x8fef4417  dyld (239.3) <4B280BB1-55F8-313F-86A6-8ADD644ED69E> /usr/lib/dyld
0x90371000 - 0x9041cfff  libcrypto.0.9.7.dylib (106) <DA3D5F8E-5822-3D41-BC1C-FFE1CC9BB42B> /usr/lib/libcrypto.0.9.7.dylib
0x9042c000 - 0x90495fff  com.apple.SystemConfiguration (1.13 - 1.13) <542075CD-9085-3F30-B84B-DD0277D6A40E> /System/Library/Frameworks/SystemConfiguration.framework/Versions/A/SystemConfiguration
0x9059b000 - 0x90800ff7  com.apple.AddressBook.framework (8.0 - 1365) <6D80FC70-269E-3C12-A9B4-279F27C58BEF> /System/Library/Frameworks/AddressBook.framework/Versions/A/AddressBook
0x9102b000 - 0x91032ffe  com.apple.agl (3.2.3 - AGL-3.2.3) <E26A1D2C-596E-31F0-8E70-FC381874F8DA> /System/Library/Frameworks/AGL.framework/Versions/A/AGL
0x92658000 - 0x9285aff7  com.apple.CoreFoundation (6.9 - 855.11) <50F70E07-043A-3A2F-87EF-A36BA6C5C9D9> /System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation
0x934da000 - 0x934daffd  com.apple.audio.units.AudioUnit (1.9 - 1.9) <8A37963C-DF6F-3DFF-94E9-407DC5DFEDA9> /System/Library/Frameworks/AudioUnit.framework/Versions/A/AudioUnit
0x93f08000 - 0x9401fffb  com.apple.WebKit (9537 - 9537.73.11) <74634980-1AC4-3874-9BC2-72E1ED8FB534> /System/Library/Frameworks/WebKit.framework/Versions/A/WebKit
0x94f26000 - 0x94f7bff7  com.apple.QuickLookFramework (5.0 - 622.3) <3C6ADC02-2C67-361B-B042-47DDCC0EDA5F> /System/Library/Frameworks/QuickLook.framework/Versions/A/QuickLook
0x95c83000 - 0x95cf8ffb  com.apple.framework.IOKit (2.0.1 - 907.1.13) <86D72735-9DFB-35C8-83F7-CE0DCF17D354> /System/Library/Frameworks/IOKit.framework/Versions/A/IOKit
0x95efa000 - 0x95f08ff7  libz.1.dylib (53) <858B4D9F-D87E-3D81-B07A-DF9632BD185F> /usr/lib/libz.1.dylib
0x9633a000 - 0x9633afff  com.apple.Carbon (154 - 157) <C49AD4A1-8DE3-357D-AEF3-D6CD39EA91EF> /System/Library/Frameworks/Carbon.framework/Versions/A/Carbon
0x964cc000 - 0x964ccfff  com.apple.Cocoa (6.8 - 20) <407DC9E6-BBCE-3D34-9BBB-00C90584FFDF> /System/Library/Frameworks/Cocoa.framework/Versions/A/Cocoa
0x96bd0000 - 0x96e3dff6  com.apple.security (7.0 - 55471) <5FCF76B2-92C6-3404-87D3-91B3F6E203AA> /System/Library/Frameworks/Security.framework/Versions/A/Security
0x96e68000 - 0x96f54ff7  libxml2.2.dylib (26) <32040145-6FD6-3AD2-B98B-39F73BF9AC47> /usr/lib/libxml2.2.dylib
0x980f9000 - 0x98112fff  com.apple.Kerberos (3.0 - 1) <91F17EB2-C70C-359C-B09D-96B52D2A9C9F> /System/Library/Frameworks/Kerberos.framework/Versions/A/Kerberos
0x98116000 - 0x98147ff4  com.apple.securityinterface (9.0 - 55047) <0D5ED2B8-C973-3C91-BA45-22501A043263> /System/Library/Frameworks/SecurityInterface.framework/Versions/A/SecurityInterface
0x9849e000 - 0x98610ffb  com.apple.audio.toolbox.AudioToolbox (1.9 - 1.9) <E5FFD35D-18CF-333C-BECE-39F8E47BE707> /System/Library/Frameworks/AudioToolbox.framework/Versions/A/AudioToolbox
0x98613000 - 0x98621ff3  com.apple.opengl (9.0.83 - 9.0.83) <16CFFD50-217E-3E18-88AF-7F2AD980628B> /System/Library/Frameworks/OpenGL.framework/Versions/A/OpenGL
0x9ac69000 - 0x9ac86ffb  libresolv.9.dylib (54) <3EC12A7F-6BA1-3976-9F1F-6A4B76303028> /usr/lib/libresolv.9.dylib
0x9b41b000 - 0x9b5c7ff1  com.apple.QuartzCore (1.8 - 332.0) <07F9B77F-35A2-3D21-99FA-CD3FCE5B9C7B> /System/Library/Frameworks/QuartzCore.framework/Versions/A/QuartzCore
0x9b8bf000 - 0x9b8c0fff  libSystem.B.dylib (1197.1.1) <C58F0CC9-C1FD-3024-9358-D3359A6BBCAD> /usr/lib/libSystem.B.dylib
0x9bb23000 - 0x9bd9fff7  com.apple.QuickTime (7.7.3 - 2826.0.1) <42542002-DCFF-3675-B919-440EC5057D56> /System/Library/Frameworks/QuickTime.framework/Versions/A/QuickTime
0x9bda0000 - 0x9bdf5ff7  com.apple.audio.CoreAudio (4.2.0 - 4.2.0) <0F1C111F-1E64-33BB-A69F-14643B3037D5> /System/Library/Frameworks/CoreAudio.framework/Versions/A/CoreAudio

Model: iMac11,1, BootROM IM111.0034.B02, 4 processors, Intel Core i7, 2.8 GHz, 8 GB, SMC 1.54f36
Graphics: ATI Radeon HD 4850, ATI Radeon HD 4850, PCIe, 512 MB
Memory Module: BANK 0/DIMM0, 2 GB, DDR3, 1067 MHz, 0x80AD, 0x484D54313235533642465238432D47372020
Memory Module: BANK 1/DIMM0, 2 GB, DDR3, 1067 MHz, 0x80AD, 0x484D54313235533642465238432D47372020
Memory Module: BANK 0/DIMM1, 2 GB, DDR3, 1067 MHz, 0x80AD, 0x484D54313235533642465238432D47372020
Memory Module: BANK 1/DIMM1, 2 GB, DDR3, 1067 MHz, 0x80AD, 0x484D54313235533642465238432D47372020
AirPort: spairport_wireless_card_type_airport_extreme (0x168C, 0x8F), Atheros 9280: 4.0.74.0-P2P
Bluetooth: Version 4.2.0f6 12982, 3 services, 23 devices, 1 incoming serial ports
Network Service: Ethernet, Ethernet, en0
Serial ATA Device: ST31000528ASQ, 1 TB
Serial ATA Device: OPTIARC DVD RW AD-5680H
USB Device: Hub
USB Device: PT-9500PC
USB Device: DG Dashuo USB-V4.0
USB Device: BRCM2046 Hub
USB Device: Bluetooth USB Host Controller
USB Device: Internal Memory Card Reader
USB Device: Hub
USB Device: Keyboard Hub
USB Device: Apple Keyboard
USB Device: IR Receiver
USB Device: Built-in iSight
Thunderbolt Bus: 

I've checked out all the forums and walked through some of the steps and I think I figured out my issue: I have NO certificate in my keychain whatsoever; Known or unknown.  My account/system administrator here is unsure how to get me a certificate because we use Office 365 and he says when I install Lync or try to log in it should be giving me a new certificate.  Does anyone know how to get me a certificate?  Or know how my administrator will get it to install a new certificate?

Had the same issue.

Found this posting.  Copied the folder using terminal and Lync 14.0.7 now starts successfully.

http://preston4tw.blogspot.com.au/2013/12/microsoft-lync-2011-for-mac-1407-bug.html

• Marked as answer by Lisa.zhengMicrosoft contingent staff, Moderator Wednesday, January 01, 2014 1:40 AM
• Unmarked as answer by Cowgirlup2226 Friday, January 10, 2014 4:19 PM

This don't work for me. I have also completely removed lync and tried 14.0.6 and still crashes

Yeah this doesn't work for me either.  I need a certificate, but we don't know how to get me one.  Lync did work on my Mac at one point a few months ago then one day it decided it didn't want to work anymore.  When I looked into the issue in forums I figured out that I completely lack a certificate in the keychain and that's why I can't login or even open Lync for that matter.  My system administrator isn't sure how to get another certificate into my keychain because it should have put a new cert in there when we uninstalled and reinstalled.  (I also need more detailed instructions when it comes to fixing this issue as I'm not exactly a Mac-expert.  I know enough, but not everything.)