The OS X El Capitan v10.11.3 Update improves the stability, compatibility, and security of your Mac, and is recommended for all users.
This update:
- Fixes an issue that may prevent some Mac computers from waking from sleep when connected to certain 4K displays.
Enterprise content:
- Third-party .pkg file receipts stored in /var/db/receipts are now retained when upgrading from OS X Yosemite.
For detailed information about the security content of this update, see Apple Security Updates.