OS X 10.10 Yosemite - Stuttering Mouse Cursor

Mac Technical Support
Hail and well met, and happy new OS day!

We're currently aware of an issue with the Confine Mouse Cursor option for all of our games which will result in a stuttering or jittery mouse on OS X 10.10 Yosemite. We are working closely with Apple to resolve the issue, and hope to have a solution soon.

In the meantime, setting your Confine Mouse Cursor option to Off will resolve the issue. We understand that this will result in issues with some games where scrolling is necessary (Heroes/Starcraft II). Should you wish to leave Confine Mouse Cursor on, you may find that enabling VSync reduces (but will not eliminate) the amount of stuttering that you encounter.

Thank you for your patience while we work on this issue! We'll provide updates as soon as they become available.

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