Apple has updated its professional video editing app, Final Cut Pro X (https://tinyurl.com/y9pppqd8), to version 10.4.2.
It fixes an issue in which selecting multiple clips using the Shift key or marquee selection could inadvertently select other clips in the timeline. It also addresses issues related to XML import and export.
Final Cut Pro 10.4.2 is available as a free update today for existing users, and for $299.99 for new users on the Mac App Store. It requires macOS 10.13.2 or later.