Creating a bootable Ubuntu USB drive on a Mac

Creating a bootable Ubuntu USB drive on a Mac involves the following steps:

1. Download Ubuntu ISO

  • Go to the Ubuntu official website.
  • Download the appropriate ISO file for your system (usually the desktop version).

2. Format the USB Drive

  1. Insert USB Drive:
    • Connect the USB drive to your Mac.
  2. Open Disk Utility:
    • Search for Disk Utility in Spotlight and open it.
  3. Select the USB Drive:
    • In Disk Utility, select the USB drive from the left-hand list.
  4. Erase the Drive:
    • Click the Erase button.
    • Choose the following:
      • Format: MS-DOS (FAT) or ExFAT
      • Scheme: GUID Partition Map
    • Click Erase to format the drive.

3. Create Bootable USB

Option 1: Using Etcher (Recommended)

  1. Download Etcher:
  2. Create the Bootable USB:
    • Open Etcher.
    • Select the Ubuntu ISO as the source.
    • Choose your USB drive as the target.
    • Click Flash to create the bootable USB.

Option 2: Using Terminal

  1. Convert the ISO to IMG (Optional):
    • Open Terminal and run:
      hdiutil convert -format UDRW -o ~/Downloads/ubuntu.img ~/Downloads/ubuntu.iso
    • This creates a .img file from the .iso.
  2. Find the USB Drive Identifier:
    • Run:
      diskutil list
    • Note the identifier for your USB drive (e.g., disk2).
  3. Unmount the USB Drive:
    • Run:
      diskutil unmountDisk /dev/disk2
    • Replace disk2 with your USB's identifier.
  4. Write the Image to USB:
    • Use dd to write the image to the USB:
      sudo dd if=~/Downloads/ubuntu.img of=/dev/disk2 bs=1m
      • Replace disk2 with your USB's identifier.
      • Wait for the process to finish (this can take some time).
  5. Eject the USB Drive:
    • Run:
      diskutil eject /dev/disk2

4. Boot from USB

  1. Restart Your Mac.
  2. Access Boot Options:
    • Hold down the Option (⌥) key immediately after the startup sound or as the screen turns on.
  3. Select the USB Drive:
    • From the boot menu, choose the USB drive with Ubuntu.

Let me know if you need further clarification!

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