https://www.theverge.com/2018/11/15/18095055/apple-final-cut-pro-x-frameio-motion-compressor-update

Final Cut Pro X, Apple’s professional video-editing software, is adding some updates today that will integrate third-party apps directly within the editing interface. Though third-party plug-ins and special effects have already been available for the software, today’s news opens up Final Cut Pro X for third-party app developers to further streamline the editing workflow. “This is the first time we are allowing third-party app integrations at this level that tie so tightly to the FCPX engine,” an Apple spokesperson said.

Apple is calling these third-party integrations “workflow extensions,” which match the Final Cut Pro X interface and allow editors to drag media between libraries, add clip markers, and sync playback between the apps and the Final Cut timeline. The first apps to be integrated today are Frame.io, Shutterstock, and CatDV, which can be downloaded for free from the Mac App Store. Apple says it’s currently working on a few more, and it will be adding more third-party extensions, like transcription service Simon Says, on an ongoing basis.