I think these issues are related, but not sure. Maybe a certificate issue on this computer.
1. Cannot get updates from App Store. I upgraded from Yosemite to public beta El Capitan. After upgrading, I got version 2and version 3 through the app store, but no version 4. If I click on Updates, I get this message: "The certificate for this server is invalid. You might be connecting to a server that is pretending to be “swscan.apple.com” which could put your confidential information at risk." I found a command line to update to version 4, but still no app store updates.
2. Anyconnect will not start correctly. I have version 4.1.04011. If I uninstall, reboot then re-install, I can get connected if I quickly enter my credentials. My connection is fine at that point. If I do not enter the credentials soon enough or disconnect/reconnect, I get the message "The VPN service is not available. Exiting. This is a snippet of the log messages when running Anyconnect:
Aug 6 12:10:54 1usmwhall acvpnagent[24857]: Function: QuickCreatePlugin File: ../../vpn/Common/Utility/PluginLoader.h Line: 199 Invoked Function: PluginLoader::CreateInstance Return Code: -29360116 (0xFE40000C) Description: PLUGINLOADER_ERROR_COULD_NOT_CREATE com.cisco.anyconnect.leaf
Aug 6 12:10:54 1usmwhall acvpnagent[24857]: Function: QuickCreatePlugin File: ../../vpn/Common/Utility/PluginLoader.h Line: 199 Invoked Function: PluginLoader::CreateInstance Return Code: -29360116 (0xFE40000C) Description: PLUGINLOADER_ERROR_COULD_NOT_CREATE com.cisco.anyconnect.service.namcntrl
Aug 6 12:10:54 1usmwhall acvpnagent[24857]: Function: QuickCreatePlugin File: ../../vpn/Common/Utility/PluginLoader.h Line: 199 Invoked Function: PluginLoader::CreateInstance Return Code: -29360116 (0xFE40000C) Description: PLUGINLOADER_ERROR_COULD_NOT_CREATE com.cisco.anyconnect.service.websecurity
Aug 6 12:10:54 1usmwhall acvpnagent[24857]: Function: QuickCreatePlugin File: ../../vpn/Common/Utility/PluginLoader.h Line: 199 Invoked Function: PluginLoader::CreateInstance Return Code: -29360116 (0xFE40000C) Description: PLUGINLOADER_ERROR_COULD_NOT_CREATE com.cisco.anyconnect.service.fireamp_enabler
Aug 6 12:10:54 1usmwhall acvpnagent[24857]: Function: LoadFileToMap File: ../../vpn/PhoneHome/PhoneHomeAgent.cpp Line: 2063 Can't open file /opt/cisco/anyconnect/CustomerExperienceFeedback/config
Aug 6 12:10:54 1usmwhall acvpnagent[24857]: Function: LoadFileToMap File: ../../vpn/PhoneHome/PhoneHomeAgent.cpp Line: 2063 Can't open file /opt/cisco/anyconnect/CustomerExperienceFeedback/history
Aug 6 12:10:55 1usmwhall com.apple.xpc.launchd[1] (com.cisco.anyconnect.vpnagentd[24857]): Service exited due to signal: Segmentation fault: 11
Aug 6 12:10:55 1usmwhall com.apple.xpc.launchd[1] (com.cisco.anyconnect.vpnagentd): Service only ran for 0 seconds. Pushing respawn out by 10 seconds.
3. Pulse Secure will not connect or allow me create profile. I have version 5.1.3.56743. I am able to connect to our UAC server through the web page. I get "Failed to connect to the Pulse Secure service". I manually added the "VeriSign Class 3 Public Primary Certification Authority - G5" certificate referenced in several other posts, such as http://forums.juniper.net/t5/SSL-VPN/Junos-Pulse-DOA-with-El-Capitan-Mac-OS-10-11/td-p/276235/page/4. This is a snippet of the log for Pulse:
00186,09 2015/08/04 12:11:11.368 3 root dsAccessService dsAccessService p58026 tC0B service.mm:79 - 'AccessService' CmdLine: /Applications/Junos Pulse.app/Contents/Plugins/JUNS/dsAccessService
00133,09 2015/08/04 12:11:11.369 3 root dsAccessService dsAccessService p58026 tC0B service.mm:115 - 'AccessService' initializing service...
00133,09 2015/08/04 12:11:11.369 3 root dsAccessService dsAccessService p58026 tC0B service.mm:141 - 'AccessService' initializing service...
00162,09 2015/08/04 12:11:11.430 3 root dsAccessService dsAccessService p58026 tC0B accessService.cpp:673 - 'AccessService' plugin NetMonitor, manual start, not starting
00174,09 2015/08/04 12:11:11.430 3 root dsAccessService dsAccessService p58026 tC0B accessService.cpp:673 - 'AccessService' plugin ConnectionStoreService, manual start, not starting
00171,09 2015/08/04 12:11:11.430 3 root dsAccessService dsAccessService p58026 tC0B accessService.cpp:669 - 'AccessService' plugin ConnectionManagerService, queuing start task...
00163,09 2015/08/04 12:11:11.455 1 root dsAccessService dsAccessService p58026 tC0B verify.cpp:62 - 'dsVerifySignature' SecStaticCodeCheckValidity failed. (status=-67050)
00232,09 2015/08/04 12:11:11.455 1 root dsAccessService dsAccessService p58026 tC0B accessPluginLoader.cpp:113 - 'AccessService' plugin /Applications/Junos Pulse.app/Contents/Plugins/ConnectionManager/connectionMgr.dylib, invalid signature
00163,09 2015/08/04 12:11:11.455 3 root dsAccessService dsAccessService p58026 tC0B accessService.cpp:673 - 'AccessService' plugin jamUIPlugin, manual start, not starting
00170,09 2015/08/04 12:11:11.455 3 root dsAccessService dsAccessService p58026 tC0B accessService.cpp:673 - 'AccessService' plugin HostCheckerService, manual start, not starting
00162,09 2015/08/04 12:11:11.455 3 root dsAccessService dsAccessService p58026 tC0B accessService.cpp:673 - 'AccessService' plugin eapService, manual start, not starting
00161,09 2015/08/04 12:11:11.455 3 root dsAccessService dsAccessService p58026 tC0B accessService.cpp:673 - 'AccessService' plugin TMService, manual start, not starting
00167,09 2015/08/04 12:11:11.455 3 root dsAccessService dsAccessService p58026 tC0B accessService.cpp:673 - 'AccessService' plugin iveAccessMethod, manual start, not starting
00167,09 2015/08/04 12:11:11.455 3 root dsAccessService dsAccessService p58026 tC0B accessService.cpp:673 - 'AccessService' plugin vpnAccessMethod, manual start, not starting
00166,09 2015/08/04 12:11:11.455 3 root dsAccessService dsAccessService p58026 tC0B accessService.cpp:673 - 'AccessService' plugin uiModelService, manual start, not starting
00149,09 2015/08/04 12:11:11.455 3 root dsAccessService dsAccessService p58026 tC0B accessService.cpp:383 - 'AccessService' notify plugin status, 11 plugins
00164,09 2015/08/04 12:11:12.343 1 root dsAccessService dsAccessService p58026 t2F03 verify.cpp:62 - 'dsVerifySignature' SecStaticCodeCheckValidity failed. (status=-67050)
00222,09 2015/08/04 12:11:12.343 1 root dsAccessService dsAccessService p58026 t2F03 accessPluginLoader.cpp:113 - 'AccessService' plugin /Applications/Junos Pulse.app/Contents/Plugins/JamUI/uiPromptPlugin.dylib, invalid signature
00187,09 2015/08/04 12:11:12.343 1 root dsAccessService dsAccessService p58026 t2F03 accessPluginLoader.cpp:607 - 'AccessService' trying to create instance on plugin jamUIPlugin while in state 1
00175,09 2015/08/04 12:11:12.344 1 whall PulseTray Pulse p57970 t1607 accessServiceApi.mm:110 - 'AccessServiceProxy' createInstance of plugin jamUIPlugin failed with error 0xe00103ee
00136,09 2015/08/04 12:11:12.358 3 whall PulseTray Pulse p57970 t1607 DialogManager.cpp:187 - 'JamUI' No plugin interface available - rc = 1006
00164,09 2015/08/04 12:11:12.375 1 root dsAccessService dsAccessService p58026 t300B verify.cpp:62 - 'dsVerifySignature' SecStaticCodeCheckValidity failed. (status=-67050)
That makes sense - normally weeding out expired certs and setting the remainder to defaults will fix the issue, but there must have been something wrong with the implementation of the Symantec CA Cert.
When you installed it, are you sure you followed steps 7 to 10 of the last post of the page you linked to? You can try that again now that you've followed the procedure I outlined above (although I suggest double-clicking it rather than importing it) and it may work for you this time - as it has for the others posting on the Junos forum.