Installing the update:
To update to iWork 9.3, use the Mac App Store, Software Update, or the standalone installer. You only need to use one of these methods to update your computer.
Mac App Store
Use this method if you originally purchased Pages, Numbers, or Keynote from the Mac App Store.
Open the Mac App Store and go to the Updates tab to update the iWork applications you purchased.
Use this method if you originally purchased iWork in a box or downloaded and then activated a trial version of iWork.
Choose Software Update from the Apple () menu to automatically check for the latest Apple software, including this update. (Software Update might have linked you to this article to learn more about the update.) If your computer is not up-to-date, other software updates available for your computer may appear. Note that an update's size may vary from computer to computer when installed using Software Update, since it automatically selects the best update for your computer. Also, some updates must be installed prior to others, so you should run Software Update more than once to make sure you have all of the available updates. OS X Lion v10.7.4 or later is required to run this update.
Use this method if you originally purchased iWork in a box or downloaded and then activated a trial version of iWork. This is an alternative method to the Software Update method above.
Download the update installer and run it manually. This is a useful option when you need to update multiple computers but only want to download the update once. Standalone installers for iWork 9.3 are available on the Apple Support Downloads page. OS X Lion v10.7.4 or later is required to run this update.
Pages 4.3, Numbers 2.3, and Keynote 5.3 are updated to support iWork for iOS 1.7 apps.
This update is recommended for users of iWork 9.0 and later.