If clips go offline after an update, highlight your library and go to File > Relink Files to point the software back to your source footage.
: In your Applications folder, right-click your current Final Cut Pro version and select . Rename the resulting file with its version number (e.g., "FCPX 10.4.4.zip"). Back Up Libraries : Copy your Library files to an external drive or use Time Machine
Better handling of 360-degree video metadata and orientation. Why Search for the "MacDMG" Version?
If you are coming from version 10.4.4 or earlier, here is what the brings to the table.