installed update; files unaccessible; message: the index xml file is missing

Hey nanifromportland,

I see that you are experiencing an issue with Numbers upon launch. I would like to suggest that you uninstall Numbers, then reinstall the application. Steps for proceeding with this can be found below:

Uninstall apps

You can uninstall apps you got from the Mac App Store, from other websites, or from discs. You can’t uninstall apps that are part of OS X, such as Safari and Mail.

Apps downloaded from the Mac App Store: Click the Launchpad icon in the Dock, hold down an app’s icon until all the icons begin to jiggle, then click an app’s delete button . If you later want the app, you can reinstall it from the Mac App Store.

OS X Yosemite: Install, update, and uninstall apps

https://support.apple.com/kb/PH18752

Take care, and thanks for visiting the Apple Support Communities.

Cheers,

Braden

Hi Nani,

Wayne Contello has written a User Tip for working with the old and new versions of iWork.

Need newer version of Numbers to open file

Regards,

Ian.

Uninstall/Reinstall did the trick for me when I got the "index xml file is missing" error. Thanks, braden85!