To successfully install and run Final Cut Pro 10.5.4, your system must meet these criteria:
Improved performance and stability when playing back H.264 or HEVC media. Final-Cut-Pro-10.5.4-MAS.dmg
Resolved technical hurdles that forced some international users to change system-wide language settings just to finalize their video projects. Technical Specifications and Requirements To successfully install and run Final Cut Pro 10
Addressed a critical issue where certain macOS Language & Region preferences caused the app to crash during export. Final-Cut-Pro-10.5.4-MAS.dmg