I have a working MacBook Pro and a crashed Windows 7 PC. I was running Ubuntu on my PC, but after a recurrent issue now I can't boot either OS. I would like to install only Ubuntu on my PC and will make Windows 7 history for good, but I am a bit puzzled by the instructions for creating a bootable USB options on the website.

If I create a bootable USB on my Mac following the instructions for OS X, would it boot in a PC?

  • Welcome to Ask Ubuntu. Could you please provide us with more information about what "cretainf bootable USB options" and what instructions for Mac OS you are referring to?
    – MadMike
    Oct 24 '13 at 5:04
  1. You will need:

    • A 4GB or larger USB stick/flash drive
    • An Apple computer or laptop running macOS
    • An Ubuntu ISO file. See Get Ubuntu for download links
  2. To ensure maximum compatibility with Apple hardware, first blank and reformat the USB stick using Apple's "Disk Utility", but this step can be skipped if you intend to use the USB stick with only generic PC hardware.

    • Launch Disk Utility from Applications -> Utilities or Spotlight search.

    • Insert your USB stick and observe the new device added to Disk Utility.

    • Select the USB stick device (you may need to enable the option View -> Show All Devices) and select Erase from the toolbar (or right-click menu).

    • Set the format to MS-DOS (FAT) and the scheme to GUID Partition Map.

    • Check you've chosen the correct device and click Erase.

      enter image description here

    Warning: Disk Utility needs to be used with caution as selecting the wrong device or partition can result in data loss.

  3. Install and run Etcher

    To write the ISO file to the USB stick, use a free and open source application called Etcher. After downloading this and clicking to mount the package, Etcher can either be run in place or dragged into your Applications folder.

    By default, recent versions of macOS block the running of applications from unidentified developers. To side-step this issue, enable App Store and identified developers in the Security & Privacy pane of System Preferences. If you are still warned against running the application, click Open Anyway in the same pane.

    enter image description here

  4. Etcher configuration

    Etcher will configure and write to your USB device in three stages, each of which needs to be selected in turn:

    • Select image will open a file requester from which should navigate to and select the ISO file downloaded previously. By default, the ISO file will be in your Downloads folder.

    • Select drive, replaced by the name of your USB device if one is already attached, lets you select your target device. You will be warned if the storage space is too small for your selected ISO.

    • Flash! will activate when both the image and the drive have been selected. As with Disk Utility, Etcher needs low-level access to your storage hardware and will ask for your password after selection.
                enter image description here

  5. Write to device

    After entering your password, Etcher will start writing the ISO file to your USB device.

    The Flash stage of the process will show progress, writing speed and an estimated duration until completion. This will be followed by a validation stage that will ensure the contents of the USB device are identical to the source image.

    When everything has finished, Etcher will declare the process a success.

    Congratulations! You now have Ubuntu on a USB stick, bootable and ready to go.

    enter image description here

    Warning: After the write process has completed, macOS may inform you that 'The disk you inserted was not readable by this computer'. Don't select Initialize. Instead, select Eject and remove the USB device.

  6. Boot your Mac

    If you want to use your USB stick with an Apple Mac, you will need to restart or power-on the Mac with the USB stick inserted while the Option/alt key is pressed.

    This will launch Apple's 'Startup Manager' which shows bootable devices connected to the machine. Your USB stick should appear as gold/yellow and labelled 'EFI Boot'. Selecting this will lead you to the standard Ubuntu boot menu.

    enter image description here

Source: Create a bootable USB stick on macOS

  • I don't know if the BIOS section here will work. Download rEFIt from refit.sourceforge.net to get a screen where you can choose from the available medium to boot off of. Usually on a mac the default is holding down option but I have had crappy success getting it to find a partition other than a mac one... Oct 24 '13 at 4:08
  • The question is about booting Ubuntu on a Windows PC. For information about how to boot Ubuntu on a Mac see this answer. To select the bootable USB in a Mac, reboot and immediately after the startup chime, press the Option key. If the bootable USB doesn't show up in the Mac when you reboot it you can install rEFIt.
    – karel
    Jul 21 '16 at 22:24

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