OSX build/mouse problem

I've exported the game for Osx, I got a zip file and all the single files, I've put everything in a folder after unzipping the file on the Mac.

I get an issue with the cursor, the Mac display flashes for a second and then the player starts. Basically I have 2 cursors, one of the Mac and one of the game, but I can't move the game cursors because of the basic mac cursor. Is a known bug, how to solve? Thanks for support guys

I know sometimes the system cursor appears above the ingame cursor in the player, but it should still be moveable.