: Outside of Apple's official channels, "free" full downloads are typically pirated copies or malware.

Apple offers a that is fully functional and safe to use. Visit the Final Cut Pro Free Trial page on Apple's website. Download the official DMG file directly from Apple.

: The only legitimate places to get Final Cut Pro are the Mac App Store or the official Apple website .

If you are specifically looking for version 10.5.1, here is what it introduced when it launched: Final Cut Pro release notes - Apple Support