Burn your CD or create a bootable USB stick on mac

先记录下 mac 刻录usb 启动的方法

有时间试试 

 

http://www.ubuntu.com/download/ubuntu/download

 

Burn your CD or create a bootable USB stick

 

 

Once you've finished downloading your file, you'll need to create a CD or USB drive.

 

Why do I need a CD?

Burning a CD means that you can try Ubuntu without affecting your current system. And you can install it alongside or instead of your system whenever you're ready.

I would like to create a:

CD  USB stick

To create it, I will be using:

Windows  Mac  Ubuntu

Show me how

 

 

Mac

We would encourage Mac users to download Ubuntu Desktop Edition by burning a CD for the time being. But if you would prefer to use a USB, please follow the instructions below.

 

Note: this procedure requires an .img file that you will be required to create from the .iso file you download.

 

TIP: Drag and Drop a file from Finder to Terminal to 'paste' the full path without typing and risking type errors.

 

1. Download the desired file
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)
4. Note: OS X tends to put the .dmg ending on the output file automatically.
5. Run diskutil list to get the current list of devices
6. Insert your flash media
7. Run diskutil list again and determine the device node assigned to your flash media (e.g. /dev/disk2)
8. Run diskutil unmountDisk /dev/diskN (replace N with the disk number from the last command; in the previous example, N would be 2)
9. 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.imgor ./ubuntu.dmg).
10. • 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.
11. Run diskutil eject /dev/diskN and remove your flash media when the command completes
12. Restart your Mac and press alt while the Mac is restarting to choose the USB-Stick