Apple has updated Final Cut Pro, its professional video editing software, to version 10.5.4. According to Apple, the upgrade “improves stability when exporting with certain macOS Language & Region preferences.”
There are also improvements for users playing back H.264 or HEVC media. You can buy Final Cut Pro from the Mac App Store for US$299.99. Version 10.5.4 is a free update for registered users. It requires macOS 10.15.6 or later.