Preferred method:
You may want to try Unetbootin.
Manual method:
Alternatively, if Unetbootin does not run under Mac OS X 10.10 Yosemite, try the following steps:
- Open Terminal and run the following command:
diskutil list
- Connect a USB stick with 4 GB or more capacity, then run again:
diskutil list
From the output of both commands, determine the device assigned to your USB stick (as an example, it may be /dev/disk2
).
Run:
diskutil unmountDisk /dev/diskN
(Replace N with the disk number from the last command; in the previous example, N would be 2.)
- Run:
sudo dd if=/path/to/image.iso of=/dev/diskN
You will need to enter your login password, and it will take some time to complete, so wait patiently.
(Replace /path/to/image.iso
with the path to the Ubuntu ISO image you downloaded, e.g. ~/Downloads/ubuntu-20.04.3-desktop-amd64.iso
, and replace N with the disk number from the last command; in the previous example, N would be 2.)
BE CAREFUL! The dd
command will erase the selected disk. Make sure you select the correct disk for of=/dev/diskN
.
- Run:
diskutil eject /dev/diskN
- Restart your Mac and press and hold alt while the Mac is restarting to choose the USB stick (
EFI Boot
option with the USB logo).