64-bit Issues in Max
With Max 8, 32-bit operating systems are no longer supported. As a result, some technologies and objects that were available in earlier versions of Max may be unavailable.
QuickTime is unavailable under 64-bit Windows, and has reduced functionality in 64-bit MacOS. Therefore, objects and functions that were based on QuickTime capabilities are not supported, including:
Codec support for the Macintosh AVF engine is limited. The known supported codecs are:
3rd Party Externals
3rd party externals require conversion to 64-bit equivalents by the developer. 32-bit externals cannot be used by the 64-bit Max application.