It is usually necessary to have both installed in the indicated versions when being acquired.
But if you do not want to install Apple Motion, follow the step-by-step instructions:
1.First quit Final Cut Pro X. The Home directory opens. Locate the Movies folder and open it. Inside is a folder called “Motion Templates.”
2.Inside it, open Motion Templates. Inside it are folders for each of the Motion templates: Compositions, Effects, Generators, Titles, and Transitions.
3.Rename Transitions folder use the Command + i shortcut in the selected folder to Transitions.localized
4.Open FCPX and locate the tab where the transitions are to see if it appeared. If it does not appear after you do the step by step, install the software compatible with Final Cut X 10.3 and Motion 5.3 or newer.