Download macOS High Sierra 10.13.3 Combo Update
This update is recommended for all macOS High Sierra users.
The macOS High Sierra 10.13.3 Update improves the stability and security of your Mac and is recommended for all users.
- Addresses an issue that could cause Messages conversations to temporarily be listed out of order
- Resolves an issue that could cause your Mac to stop responding when connected to an SMB server
See Apple Security Updates for detailed information about the security content of this update.