Download of ChapterWork 1.5.1 for Mac was available from the developer's website when we last checked. We cannot confirm if there is a free download of this app available.
According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. The program belongs to Audio & Video Tools. The actual developer of this software for Mac is einstein's legacy.
From the developer:
ChapterWork is a modern utility for working with the chapter tracks and markers in your digital movies. Built on Apple's AVFoundation technology, ChapterWork frees users from using labor-intensive text-based tools and provides simple and effective methods for creating, updating and internationalizing your movie's chapter tracks.
You may want to check out more software for Mac, such as ChapterWork SX, which might be similar to ChapterWork.