You may find this useful if you have your Mac set to boot to a non-Mac OS volume, such as Windows or Linux.
Ị nwere ike ịchọta nke a bara uru ma ọ bụrụ na ị nwere Mac gị ịkwalite ka ọ bụrụ na ị naghị ebu Mac os, dịka Windows ma ọ bụ Linux.