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Mi macbook no se como reinstalar el sisitema operativo How to reinstall my MacBook, operating system does not raise My MacBook does not know how to reinstall the operating system

Revise esta T/N de Apple About macOS Recovery. Si eso no funciona, sospecho que debe reemplazar su cable SATA MacBook Pro 13" Unibody (Mid 2012) Hard Drive Cable Siga esta guía IFIXIT: MacBook Pro 13" Unibody Mid 2012 Hard Drive Cable Replacement, querrá colocar un Tira de cinta de electricistas en la mayúscula donde el cable se cruza para ayudar a protegerlo de la superficie de aluminio en bruto. Además, no desea doblar en exceso las curvas que desea, los arcos suaves no las curvas pronunciadas. Review this Apple T/N About macOS Recovery. If that fails to work I’m suspecting your SATA cable needs replacing MacBook Pro 13" Unibody (Mid 2012) Hard Drive Cable. Follow this IFIXIT guide: MacBook Pro 13" Unibody Mid 2012 Hard Drive Cable Replacement, you’ll want to place a strip of electricians tape on the uppercase where the cable crosses to help protect it from the rough aluminum surface. Also you don’t want to over fold the bends you want smooth arcs not sharp bends.