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[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/
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.
I can't open moc3 or any files on Live2d Viewer.
I need to make expressions for my VTUBER model but whenever I open Live2d Viewer and drag a moc3 file in or whatever it asks for, it loads for a bit then disappears? Like, nothing pops up. And I click on "open" or sometimes it'd be "open recent file" but once again, it just loads and then poof, nothing happens or opens up.
Comments
If some of the files required for importing are missing or renamed, you will not be able to import the files into Cubism Viewer.
Please try exporting the file again and see if you can import the reexported file into the Viewer.
Best regards.
Please update your graphics board driver to the latest version.
Does the problem improve?
In addition, Cubism Editor and Viewer are supported only on computers that meet the following operating environment requirements.
https://www.live2d.com/en/#cubismspec