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I am trying to install Ubuntu 14.04.4 from my usb following the instructions in http://www.ubuntu.com/download/desktop/install-ubuntu-desktop . I downloaded it and put it my usb. But when I restart my computer, I do not get a "welcome screen prompting you to choose your language and giving you the option to install Ubuntu or try it from the USB".

I tried to press F12, but it does not work.

Any idea?

Thank you.

Mencia
  • 105

1 Answers1

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First you need to create Bootable usb

  1. Download Ubuntu Desktop
  2. Open the Terminal (in /Applications/Utilities/ or query Terminal in Spotlight).

  3. Convert the .iso file to .img using the convert option of hdiutil e.g.,

    $ hdiutil convert -format UDRW -o ~/path/to/target.img ~/path/to/ubuntu.iso

    Note: OS X tends to put the .dmg ending on the output file automatically.

  4. Run

    diskutil list

    to get the current list of devices.

  5. Insert your flash media.

  6. Run

    diskutil list

    again and determine the device node assigned to your flash media (e.g. /dev/disk2).

  7. Run

    diskutil unmountDisk /dev/diskN

    (replace N with the disk number from the last command; in the previous example, N would be 2).

  8. Execute

    sudo dd if=/path/to/downloaded.img of=/dev/rdiskN bs=1m

    (replace /path/to/downloaded.img with the path where the image file is located; for example, ./ubuntu.img or ./ubuntu.dmg). Using /dev/rdisk instead of /dev/disk may be faster If you see the error dd: Invalid number '1m', you are using GNU dd. Use the same command but replace bs=1m with bs=1M If you see the error dd: /dev/diskN: Resource busy, make sure the disk is not in use. Start the 'Disk Utility.app' and unmount (don't eject) the drive. Also be aware that you won't be able to see the progress of image creation and it may take up to an hour sometimes.

  9. Run

    diskutil eject /dev/diskN

    and remove your flash media when the command completes. 10 Restart your Mac and press alt/option key while the Mac is restarting to choose the USB stick.

Instructions taken from official docs here.

Also check that you can choose which device you want to boot from from boot menu (do not change the default instead use something like F12 to choose the device) this will depend on the model of pc.

T.Chmelevskij
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