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Download macOS High Sierra 10.13.3 Update

The macOS High Sierra 10.13.3 improves the security and stability of your Mac, and is recommended for all users. ​


This update:

    • Addresses an issue that could cause Messages conversations to temporarily be listed out of order
For more detailed information about this update, please visit:
For detailed information about the security content of this update, please visit:
Which update should I install?
Choose the macOS High Sierra 10.13.3 update that corresponds to your Mac:



File Size: 2 GB

System Requirements Supported Languages