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<b class="Bold"><big>Live2D Cubism</big></b>
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※We cannot guarantee statements or answers from Live2D staff. Thank you for your understanding in advance.
<b class="Bold"><big>Live2D Cubism</big></b>
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[About Cubism Editor / SDK 5.4 Alpha](Updated: July 14, 2026)
You can download the alpha installer from the dedicated forum below.
If you have any feedback regarding the alpha version, including feature requests or bug reports, please use the same forum.
Cubism Editor / SDK 5.4 Alpha Forum
https://creatorsforum.live2d.com/c/cubismeditorsdk54alpha/
[Regarding macOS Tahoe](Updated October 16, 2025)
macOS v26 Tahoe is now supported!
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/
You can download the alpha installer from the dedicated forum below.
If you have any feedback regarding the alpha version, including feature requests or bug reports, please use the same forum.
Cubism Editor / SDK 5.4 Alpha Forum
https://creatorsforum.live2d.com/c/cubismeditorsdk54alpha/
[Regarding macOS Tahoe](Updated October 16, 2025)
macOS v26 Tahoe is now supported!
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 <a href="https://www.live2d.jp/eng/contact/?redirect=1">email form.</a>
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