Updating boot caches os x
This command makes the audio in the cache to start working again.#3.
Note: This particular guide is for Lenovo Z50-70 but it works for G50 ad Z40 also because the drivers are pretty the same and work on all. fit=300,226" data-large-file="https://i1com/ OS-Sierra-on-Drive.jpg? fit=720,543" class="wp-image-6392" src="https://i2com/ OS-Sierra-on-Drive.jpg? resize=600,452" alt="[Exclusive Guide] Install mac OS Sierra on Lenovo Z50-70/ Z40/ G50" srcset="https://i1com/ OS-Sierra-on-Drive.jpg? w=1440 1440w" sizes="(max-width: 600px) 100vw, 600px" data-recalc-dims="1" /[Exclusive Guide] Install mac OS Sierra on Lenovo Y50-70 (1080p-UHD) " data-medium-file="https://i2com/ OS-Sierra-Installed.jpg?
This happens after installing new/updated kexts or after the initial installation, you may lose audio, So need to bring it back to the cache.#1.
Make you sure you have installed then audio kext for your laptop.
This method is using the clover EFI and the guide below is experienced on Lenovo z50-70.
The purpose of this post is to install mac OS Sierra on Lenovo z50-70 and fixing all the drivers.