macOS 10.15.3 was an update to macOS 10.15 (Catalina) released on January 28, 2020.
This update adds the following features:
- 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 MacBook Pro (16-inch, 2019)
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