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South Placer County

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Mac IOS 12.3.1

Apple announced iOS 15, iPadOS 15, and macOS Monterey for iPhone, iPad, and Mac during its annual WWDC keynote in June 2021. iPhone and iPad updates were released on September 20, while macOS Monterey arrives on October 25, 2021.

Which macOS version is the latest? 12.3.1

As updates that change the macOS version number become available, this article is updated to show the latest version of that macOS. If a later version is compatible with your Mac, you can install the latest Apple software updates to get it.