Create a bootable USB flash disk on MacOs?..

  • Hello,

    Couldn't find a good how-to make a bootable usb disk on macOS, so I made this for anyone else looking.

    1. Download the memstick version
    2. run "$ diskutil list"
    3. insert your flash media
    4. run "$ diskutil list" again, notice the new device that has appered
    5. run "$ diskutil unmountDisk /dev/diskN", were "N" is the device number
    6. extract your downloeded copy, so that you get the ".img" file
    7. convert your downloaded copy of pfSense to iso "$ hdiutil convert pfSense-CE-memstick-2.4.2-RELEASE-amd64.img -format UDRW -o pfSense-CE-memstick-2.4.2-RELEASE-amd64.iso"
    8. Remove the ".dmg" file extension of the outputtet file.
    9. write the "iso" file to flash drive "$ sudo dd if=pfSense-CE-memstick-2.4.2-RELEASE-amd64.iso of=/dev/rdisk2 bs=1m". Notice the "r" in "rdisk". This will speed things up.
    10. eject the flash drive, "$ diskutil eject /dev/disk2"
    11. Done!


  • Balena Etcher works great.

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