MCX8000 is supported up to Engine Prime version 1.6.1. When exporting to USB media you need to enable compatibility in the Engine preference+use the special MCX8000 export option.
Check this thread and the video in the linked thread:
MCX8000 is supported up to Engine Prime version 1.6.1. When exporting to USB media you need to enable compatibility in the Engine preference+use the special MCX8000 export option.
Check this thread and the video in the linked thread: