[Regarding macOS Tahoe](Updated September 18, 2025)
We cannot guarantee the compatibility of the current releases of Live2D Cubism Editor and Cubism SDK with macOS Tahoe.
We advise against upgrading your macOS at this time as it may cause Live2D products not to function correctly.
Upgrading macOS can also cause you to lose your Cubism Editor license file.
Please make sure to deactivate your Cubism Editor license before upgrading the macOS.
For more details:
https://help.live2d.com/en/other/other_09/For inquiries regarding issues with license purchases or license activation errors, please contact us through the
email form.Why are "Quicktime-related features unavailable" on OS X?
I am a Mac user, and I cannot successfully export movie in any version of animator.

I looked up for the instructions, but none of them worked.
At the same time, I cannot load the models with the Aftereffect pulgin.
It just said invalid index in indexed group and stuck.
So now I am kind of out of choice..
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Comments
In the case of Mac, an older version of QuickTime can not be installed .
For this reason , it is unable to Export Movie .
Live2D Manual - Q. For installation and configuration of QuickTime7
In the case of Windows, you can Export Movie it is possible to install an older version of QuickTime.
Live2D Community - QuickTime 7.78 is okay?
I'm hoping to be improved in future Live2D version up .I have the newest version of QuickTime installed, which is QuickTime 10.4, and I installed a compatible version, QuickTime 7.6.6, but the animator still does not work. Then I tried to install the newest version of QuickTime I can find on the Apple website, which is QuickTIme 7.7, but it cannot be installed in my computer because I cannot remove the QuickTime 10.4.
Now I am totally lost.
I had a similar problem when I tried to export in movie file. My computer is PC though using windows 10 so I'm not sure if this will help you solve it. I found this link very helpful: http://community.live2d.com/discussion/comment/187/#Comment_187
My solution was to do the Java part which I didn't have it check when I installed it.
I would suggest reinstalling QT 7.6.6 and check the java part.
I hope you can find your answer. Good luck.