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Download macOS Catalina 10.15.3 Update

The macOS Catalina 10.15.3 update improves the stability, reliability, and security of your Mac, and is recommended for all users. 

This update:
• Optimizes gamma handling of low gray levels on Pro Display XDR for SDR workflows when using macOS
• Improves multi-stream video editing performance for HEVC and H.264 encoded 4K video on the 16-inch MacBook Pro (2019)

For more detailed information about this update, please visit:
For detailed information about the security content of this update, please visit:

File Size: 2.99 GB

System Requirements Supported Languages