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/cdn.vox-cdn.com/uploads/chorus_asset/file/20047840/mac_os_x.jpg "Big Sur is officially macOS 11.0 as Apple finally leaves OS X behind - The Verge")
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WinWorld: Mac OS X Developer Previews
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The full list of all macOS versions until 2023
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Timeline of Key Features Added to Every Mac OS X Release to Date - The Mac Security Blog
