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Apple addresses macOS Big Sur upgrade issues impacting 2013 and 2014 MacBook Pro models | AppleInsider
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macOS 11.0 'Big Sur' will natively support all Macs from mid-2013 to current, dropping support for all pre-Retina MacBook Pros and the first gen Retinas. : r/mac
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Apple MacBook Pro 15″ Retina Mid 2015 Core i7-4870HQ 2.5GHz 16GB 500GB SSD macOS 11 Big Sur – Refresh Computers Online Marketplace
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