How to update Lenovo Laptop BIOS with USB stick

This article provides instructions for creating a bootable USB stick to update a Lenovo laptop's BIOS using a Mac or Linux system. It explains how to download the BIOS update as an ISO file, extract it using the `geteltorito.pl` script, and write the extracted file directly to a USB drive using the `dd` command. The guide notes that tools like Rufus may not recognize the ISO file and that enabling Legacy boot in the BIOS may be necessary before the update.

- Creating the bootable USB stick was done with Mac laptop, but the instructions should work with any Linux OS. - Download BIOS Update Bootable CD .iso file - On download geteltorito.pl for extracting the BIOS.iso file the BIOS.iso name depends on the file you downloaded . At least Rufus couldn't recognize that file, so it couldn't be used to make bootable USB stick. - On Mac/Linux commandline, set the script executable chmod a+x ./geteltorito.pl - Extract the BIOS.iso ./geteltorito.pl -o output filename r0duj27wd.iso - Format USB stick with Disk Utility or other way . - Unmount the USB stick, can be done in Disk Utility =Mac software - Check USB device path in command line diskutil list There are other disks listed, check what's the USB stick /dev/disk2 external, physical : : TYPE NAME SIZE IDENTIFIER 0: FDisk partition scheme 30.8 GB disk2 1: DOS FAT 12 PCDOS 6 16.8 MB disk2s1 - Write the BIOS file to USB stick - Attention There's r in /dev/rdisk2 - If there's error of disk in usage, try unmouting and/or unplugging and then plugging in the USB stick. sudo dd if=./output filename of=/dev/rdisk2 bs=1m 16+0 records in 16+0 records out 16777216 bytes transferred in 0.537183 secs 31231842 bytes/sec - Now you should be able to boot with the stick and update the BIOS. - Maybe you need to allow Legacy boot in the BIOS before hand.