Write an article based on this "Navigate to the official Blackberry website at http://us.blackberry.com/software/desktop.html. Select the option to download Blackberry Desktop Software for your computer running Mac OS X. Select the option to save the software to your desktop, then double-click on the installer file to launch the installer wizard. Follow the on-screen prompts to install Blackberry Desktop Software on your computer. Connect the Blackberry Curve 8520 to your computer using a USB cable. Click on “Applications” near the top of the Blackberry Desktop Software window. Click on “Check for updates,” then select the software update displayed on-screen. Place checkmarks next to “Back up and restore device data” and “Back up and restore third-party applications. Click on “Start Update. Wait for Blackberry Desktop Software to inform you updating is complete, then disconnect the device from your computer."
Blackberry Desktop Software allows you to update your Blackberry software, as well as sync and back up contacts, email, calendars, and other personal data with your computer.  The program will launch automatically following installation. Blackberry Desktop Software will automatically detect your device within a few minutes.   ” Selecting these options will allow Blackberry Desktop Software to back up all personal data to your computer, and lower the risk for data loss in the event the update fails to complete. ” Blackberry Desktop Software will begin updating your device, which may take up to 30 minutes to complete. Your Blackberry Curve 8520 will now be updated with the latest software.