Please note that if you want to create subtitles and had QuickTime 7 Pro installed, you may have to reinstall it after upgrading to Sierra. You can find it here:
- Depending on how you open your movie files, they may launch by default in QuickTime X. So if you’re doing things like subtitling, make sure to open your subtitled movies in QuickTime 7.6.6.
- In Sierra, QuickTime 7 installs to your Applications > Utilities folder rather than the “Applications” folder.
Please let us know if you have any questions or experience any issues with Sierra. We will continue to update this page as we learn more.