All the usual caveats apply, backup before you modify the system, delete the items (or move them to another disk or folder if you are worried about deleting the wrong thing) but ensure the originals are gone or updated.
Use the Finders "Go menu > Go to Folder…" to open the hidden ~/Library (your users library).
Reboot for the system changes to take effect (items in /Library).
Focus on …
Gpernal wrote:
Startup Items:
HWNetMgr - Path: /Library/StartupItems/HWNetMgr
HWPortDetect - Path: /Library/StartupItems/HWPortDetect
Kernel Extensions:
com.rim.driver.BlackBerryUSBDriverInt (0.0.97)
Launch Daemons:
[loaded] com.adobe.fpsaud.plist
[loaded] com.microsoft.office.licensing.helper.plist
[loaded] com.oracle.java.JavaUpdateHelper.plist
[loaded] com.rim.BBDaemon.plist
Launch Agents:
[loaded] com.citrix.AuthManager_Mac.plist
[loaded] com.citrix.ServiceRecords.plist
[loaded] com.hp.productresearch.plist
[loaded] com.rim.BBAlbumArtCacher.plist
[loaded] com.rim.BBLaunchAgent.plist
User Launch Agents:
[loaded] com.adobe.ARM.[...].plist
User Login Items:
iTunesHelper
Dropbox
Path Finder
3rd Party Preference Panes:
Citrix ShareFile Sync
Flash Player
Java
MacFUSE
Internet Plug-ins:
AdobePDFViewer.plugin
AdobePDFViewerNPAPI.plugin
CitrixICAClientPlugIn.plugin
Default Browser.plugin
Flash Player.plugin
FlashPlayer-10.6.plugin
JavaAppletPlugin.plugin
QuickTime Plugin.plugin
SharePointBrowserPlugin.plugin
Silverlight.plugin
User Internet Plug-ins:
CitrixOnlineWebDeploymentPlugin.plugin
WebEx64.plugin
Startup Items:
Inside /Library/StartupItems/
These have been discontinued by Apple since Mac OS 10.4. They are responsible for making changes at a system level. Remove them all or spend time ensuring ALL related software is up to date. You need a very good reason to have anything installed in here.
Kernel Extensions:
Inside /Library/Extensions/
These also load third party code, but they insert it into the 'core' of the OS. These can be safe, however you must ensure the related tools or apps are up to date, otherwise the system is basically built upon quicksand. Remove them all & see if the OS works better.
Launchd jobs: several types
LaunchAgents - Stored in /Library/LaunchAgents
LaunchDaemons - Stored in /Library/LaunchDaemons
User LaunchAgents - Stored in ~/Library/LaunchAgents
These are all background jobs, they are not necessarily bad, but if they are loading old code it could be doing untold damage to the performance & stability of the entire OS. Focus on the System level jobs (the ones inside /Library - the system level) also look at 'failed' jobs.
EtreCheck gives a status on launchd jobs…
[loaded] - a running job
[not loaded] - jobs that are set not to run, basically harmless, remove them unless you plan to use the associated software (if it is up to date)
[failed] - jobs in a crashed or unknown state, it could be forking processes or using all the system resources, remove these.
User login items:
Applications and helpers that are managed inside 'Systems Preferences > Users and groups > Login Items tab'.
These are loaded at the 'User level', consider removing all of them whilst you troubleshoot. When you decide to re-add them ensure the software is up to date.
3rd Party Preference Panes: & Internet Plug-ins:
/Library/PreferencePanes/ and ~/Library/PreferencePanes/
/Library/Internet Plug-Ins/ and ~/Library/Internet Plug-Ins/
Once again these items all must be up to date, or remove them from your system. If the prefpanes manage additional software use the uninstaller or see the developers site for uninstall instructions.
Read the list of Internet plug-ins carefully, there are often duplicate Flash player versions that won't help stability, it's just wasted space too.
Don't forget to also update Safari's extensions in it's preferences (if you have any).
Overall your system doesn't look too bad, but the startup items & kernel extension should be looked at.
If the issue persists move onto removing the launchd jobs & login items. Ultimately you want everything updated or removed if you don't need it.