Apple has released an update to macOS Sierra that can help restore a device’s bootloader after a crash or system restart.
The update comes in the form of a software update, known as a macOS Sierra Sierra 10.13.5, which is available for all new Macs running OS X 10.10.4.
Users of Macs that have not upgraded to the 10.12.4 version of macOS Sierra will need to manually update their system and reinstall the OS.
To get started, follow the on-screen instructions, then select the macOS Sierra 10 and upgrade the bootloader to the highest level.
After that, you’ll need to restart the computer to complete the process.
Apple previously said the 10 and 10.11.5 versions of the operating system could restore the boot loaders of Mac computers, but the company has since clarified that recovery was not possible.
Users can manually install the software update to their devices by clicking on the Update Now button at the bottom of the Home screen, then selecting the macOS 10.9.4 update.