[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.License Activation Error due to tampering with system clock settings

Earlier today I changed my systems clock settings briefly to test how those settings worked. I didn't realize how this would lock me out of my software and prevent me from working!
After syncing my system's clock to automatically update I am still locked out of my license and cannot use the software
I have tried opening older version of the software, reinstalling, restarting, basic troubleshooting steps and am still unable to work inside the software
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Comments
my license also doesn't expire until mid-2025
I believe this may be a server-side issue where my license is permanently bound to february 14th (now 15th) since that is the last time the license was authenticated online.
There should be a way in the future to deactivate a license remotely on the live2d site and also a way to prevent the license from overwriting the date to a future, non-existent time on the servers.
Thank you for always using our products.
We sincerely apologize for the late reply. Sorry to keep you waiting.
https://www.live2d.jp/eng/contact/?redirect=1
If you have any questions regarding licensing, please use the inquiry form.
We apologize for the inconvenience, but please contact us by email.
Thank you.