Installing Adobe Reader X is a two-step process. First you download the installation package, and then you install Reader from that package file. You don't have to remove the older version of Reader if you are installing Reader X. For step-by-step installation instructions, see Install Adobe Reader X | Mac OS.
Do one of the following to reinstall your application:
- Reader: Go to the Adobe Reader Downloads page and click "Do you have a different language or operating system?" Choose your operating system, language, and Reader version from the menus. Then click Download Now to reinstall Reader.
- Acrobat: Reinstall Acrobat from your installation disc.
This solution works best for error 1301, but can be used to troubleshoot other updater error conditions. For instructions, see Enabling and using the "root" user in Mac OS X on the Apple website.
If you get error 1500, see "Why does the Updater dialog appear to 'hang' during an update on my Macintosh?" in the FAQ.
For details on how to configure and troubleshoot the Updater, see the Acrobat-Reader Updater Guide.