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Apple's Mac OS X First Shipped 20 Years Ago Today | Redmond Pie
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Apple OS X El Capitan Reviews 2023: Details, Pricing, & Features | G2
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macOS - Wikipedia
Apple's Mac OS X Is Open Source Now
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Apple Offers Free Downloads Of OS X Lion And Mountain Lion | Macworld
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Apple Officially Drops 'Mac' Name from OS X Mountain Lion - MacRumors
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