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2.4GHz, 2.7GHz, or 2.8GHz quad-core Intel Core i7 processor (Turbo Boost up to 3.8GHz) with 6MB shared L3 cache. Released February 2013.

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How to boot in safe mode

How to boot my MACBook in safe mode

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Review this Mac startup key combinations

Shift (⇧):  To start up in Safe Mode

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