We recommend to install Parallels Desktop updates when they are available because they contain critical fixes and improvements.
To check for Updates and install if found go to the Parallels Desktop menu and click on Check for Updates...
If an update for your version of Parallels Desktop is found you will be offered to download and install the update.
Links to direct downloads
The latest update is also available for manual download. You may use this option if Parallels Desktop does not start and you are unable to check for updates from within the product.
Download Parallels Desktop 9 for Mac (latest update) http://www.parallels.com/directdownload/pd9/
Download Parallels Desktop 8 for Mac (latest update) http://www.parallels.com/directdownload/pd8/
For links to earlier versions of Parallels Desktop please visit http://kb.parallels.com/5802