Apple has released the first public beta of macOS Catalina, the latest version of its Mac software announced at WWDC 2019 earlier this month. While Catalina – aka macOS 10.15 – isn’t expected to be fully released until later in the year, this public beta allows those feeling brave or ambitious (or some combination of the two) to try it out in advance.
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https://www.slashgear.com/the-macos-catalina-public-beta-is-here-24581482/