Adobe Flash Player 10.3 is the supported player for older Intel-based Mac OS X 10.4 and 10.5 systems. On some systems, users sometimes see a blank or black screen while attempting to play protected video content on services such as Amazon Instant Video. The Adobe Flash Player automatically downloads a specific module used for protected video content playback on first use.
An incorrect Adobe Flash Access DRM (Digital Rights Management) module deployed in early December 2011 caused this bad video playback behavior. The bad module has since been replaced.
Systems that downloaded the incorrect module cannot play protected video content until either 1) a Flash Player upgrade or 2) removal of the bad DRM module. This document describes how to remove the incorrect DRM module so the Adobe Flash Player can upgrade to the corrected DRM module.
Mac OS X 10.4 and 10.5 systems require the latest Adobe Flash Player version 10.3. Navigate to the Flash Player download site to verify install of the latest Adobe Flash Player version.
Adobe publishes all platform support for 32 bit and 64 bit in the system requirements section of the Flash Player site.
Note: Flash Player 11 is not supported on the older Mac OS X versions discussed in this article.
Ensuring installation of the correct Flash Player library and removal of the incorrect Flash Access DRM module restores video playback with protected content.
Using Finder, delete the entire contents of the Flash Player "/NativeCache" directory containing the older, incorrect DRM module.
for example, /Users/John/Library/Caches/Adobe/Flash Player/NativeCache/
Warning: Be careful no other directories are selected while deleting /NativeCache. This action could corrupt your Mac OS X operating system installation!!