It looks like mostly awaited bug-fixes for the previous big v10.3 update (there were a few niggles with the new Track Alternative functions amongst other things), but also adds updated Audio Unit v3 compatibility.
Apple Logic Pro X tips and tricks
It looks like mostly awaited bug-fixes for the previous big v10.3 update (there were a few niggles with the new Track Alternative functions amongst other things), but also adds updated Audio Unit v3 compatibility.