**System Information**
OS X El Capitan Version 10.11.1, iMac 27"
Grafix card: ATI Radeon HD 4850 512 MB, 27"
CPU: 2,8GHz Intel Core i7
16 GB RAM DDR3
**Blender Version**
Broken: 2.76b 2015.11.03 10:56 Hash: f337fea
**Short description of error**
Mouse cursor and moving objects appear double in 3D view.
If I move the default cube in the default scene using e.g. G-key then the mouse cursor and also the cube appear double on the screen. Also the green line cursor in the timeline view appears double if moved with the mouse.
If I look close to it I can see that the cube and the cursor are flickering.
This means that they don't appear twice at the same time. The cube/cursor appears one time on the left position and the other time on the right and so on.
You can see it quite well in the video I made:
https://vimeo.com/146484009
In previous versions of Blender and OSX Yosemite this did not happen, everything was fine.
I could not test earlier versions of Blender (e.g. 2.70) in El Capitan since all of them crash.
Good luck!