Periodically, Parallels provides free software updates to improve Parallels Desktop.
By default, Parallels Desktop is configured to automatically check for and download available software updates once a week. When an update is available, Parallels Desktop prompts you to install it. Simply follow the onscreen instructions.
Note: Parallels Desktop for App Store receives updates via the Mac App Store update process. For more information on the differences between the Standard and App Store editions, follow this link.
Click the Parallels icon in the menu bar and choose Preferences. Then click General.
Right-click the Parallels Desktop icon in the Dock and choose Preferences. Then click General.
To choose whether you want Parallels Desktop to download updates automatically, select or deselect Download updates automatically.
If you choose not to download updates automatically, Parallels Desktop notifies you when an update is available and asks whether you want to download it.