Mac users can update system software and apps on a Mac in three easy steps.
- Click on the Apple menu
- Click on the "App Store" from the menu bar
- Click the “Updates” section in the App store
Always backup your Mac before installing any system software updates. Flash must be updated separately from Adobe, but another approach would be to uninstall Flash completely and use the plug-in sandboxed in Chrome browser instead. The plug-in will update itself along with the browser.
Try to always keep your Mac up-to-date for the latest security and features. Happy updating!