The macOS Sierra 10.12.4 update improves the stability, compatibility, and security of your Mac, and is recommended for all users.
This update:
• Adds Night Shift for automatically shifting the colors in your display to the warmer end of the spectrum after dark
• Adds Siri support for cricket sports scores and statistics for Indian Premier League and International Cricket Council
• Adds Dictation support for Shanghainese
• Resolves several PDF rendering and annotation issues in Preview
• Improves the visibility of the subject line when using Conversation View in Mail
• Fixes an issue that may prevent content from appearing in Mail messages
For more detailed information about this update, please visit: https://support.apple.com/kb/HT207536
For detailed information about the security content of this update, please visit: https://support.apple.com/kb/HT201222
