Some of the Mac users who are not aware of how to use split view in OS X EI Capitan will be discover a feature that isn’t working for them, and they are not able to place two full screen apps side by side into Split View.
The inability to use Split View is typically because the user has upgraded OS X from a prior release of system software, and a particular setting has carried forward which is preventing Split View from working. If you’re aware then simply follow the steps given :
- Open the preferences from the Apple menu and choose Mission Control.
- Check the box next to Displays have separate space.
- Log out or back in, or reboot the Mac for change to take effect.
Once the Mac has booted back up again, you can place a window into Split View by holding down the green button or with Mission Control as described here, it should work without incident at this point.