PowerPC-based Macs are supported only by Flash Player 10.1 and cannot play Adobe Access content. Mac OS X v10.4 and v10.5 are supported only by Flash Player 10.3 and, when in 64 bit mode, cannot play Adobe Access content.
The Adobe Access 4 SDK supports backward compatibility of Adobe Flash Access 2 features with Adobe Flash Player 10.1, 10.2, and 10.3, and Adobe AIR 2.x and Adobe Access 3 features with Flash Player 11.0 or later and AIR 3.0 or later.
Also, Flash Player 11.0 and later and AIR 3.0 and later clients support backward compatibility of Adobe Flash Access 2 features with the Adobe Flash Access 2 SDK.