Apple has dropped an update to it’s computer operating system, macOS Catalina. The update includes improvements to security, fixes compatibility issues and provides more stability, and is recommended for all users. This bring macOS Catalina up to version 10.15.3
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Amongst other things, this update is designed to improve muti-stream editing performance for both HEVC and H.264 4k videos on Macbook, and also optimized gamma handling of low grey levels on pro display when using macOS.
To get the update, head over to System Preferences in the Apple Menu (the little icon) and then click software update. Alternatively, you can open the Mac App Store and update from there.