Final Cut Pro was a specific maintenance update released on April 30, 2018, primarily designed to fix bugs related to timeline selections and XML support .
To get the most accurate version for your specific Mac, you can check the Official FCP Release Notes . Final Cut Pro 10.4.2
(Introduced in 10.4.1) A new codec for high-performance RAW editing. Final Cut Pro was a specific maintenance update
Depending on your goal, here are a few options for how you might "post" about it today: Option 1: The "Bug Fix" Announcement (Technical) Final Cut Pro 10.4.2