If you manage to find a legitimate final cut pro 10.4.6 dmg, here is exactly what you are unlocking.
The 10.4.6 release was primarily a stability and compatibility update rather than a major feature overhaul. Its most critical function was preparing editors for the transition away from the QuickTime 7 framework. final cut pro 10.4.6 dmg
Version 10.4.6 introduced better round-tripping with DaVinci Resolve and After Effects via XML 1.9, preserving color grades and effect parameters more faithfully. If you manage to find a legitimate final cut pro 10