Final Cut Pro
For Final Cut Pro, collaboration relies on Library Locking. In PostLab, an FCP Library is added as a Document inside a Production. Once a Library's opened from a Production, PostLab locks that Library for your exclusive use. If another Team Member accesses that Library, PostLab identifies who locked the Library, from which computer, and when.
Final Cut Pro - Library Locking
To unlock the Library for another Team Member, upload your work in PostLab. PostLab automatically closes your Library in FCP and removes the lock from your Library.