Mouse Cursor bang on the middle of the screen

[Hurla]

This isn't necessarily an issue with the game itself. To hide the operating system mouse cursor, applications make OS system calls which has the operating system hide the cursor. It would appear the system is not acknowledging the game's request to hide the cursor (when in full screen mode). I'm not a Mac user, nor have i developed anything for Mac, so i'm not sure if there is a mouse setting that a user can enable on their system that prevents the cursor from hiding for full screen applications.

Well I have a lot of steam games and non of them has this problem.