Updating third-party software helps avoid issues such as applications not opening, missing features, using an abnormally high amount of the CPU, or affecting a portable Mac's battery run time.
To update third-party software that wa purchased from the Mac App Store, first check the Mac App Store. A badge will automatically appear in the Updates section of the Mac App Store for software with available updates. You can choose to install all updates with a single click, or select specific updates. For other third-party applications, check with the manufacturer for updates.
To troubleshoot Apple software issues, please see this article for troubleshooting steps.
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Using Activity Monitor to check for issues
To verify if a third-party application is causing a system issue, such as battery run time too short, or system running warm, you can check Activity Monitor for processor usage. Check for updates for any applications that show abnormal activity. These updates may include updated drivers, applications, or patches. The Mac App Store will automatically locate any updates for available third-party software.
Note: Mac OS X v10.6 and OS X Lion will try to prevent known-incompatible software from opening.
See what the difference is between an upgrade and an update.