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We would encourage Mac users to download Ubuntu Desktop Edition by burning a CD. But if you prefer to use a USB stick, please follow the instructions below. Note:  this procedure requires that you create an .img file from the .iso file you download. It will also change the filesystem that is on the USB stick to make it bootable, so backup all data before continuing. Tip:  Drag and drop a file from Finder to Terminal to 'paste' the full path without risking typing errors. 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

If you've purchased a PC from Dell lately you might have noticed that there is an option to get the recovery media, specifically Windows 8.1, on an 8GB USB flash drive. If you work in an IT department, these flash drives might start piling up and you might want to try and use them, at least some of them, for something else. Here's the rub... the freaking things are read only. I don't know about Dell's consumer level PC's but stuff like the Latitude laptops can be had with an optional 8GB bootable USB 3.0 flash drive with Windows 8.1 on it. Unfortunately, these flash drives are write protected. They can't be written to, formatted, or partitioned, but if you're willing to loose all the data currently on the drive, they can be made to work. Low level formatting the drive will wipe all the data and disable the write protection. A Dell USB flash drive without it's skin A close up of the USB controller chip - Phison PS2251-07 Nope. Cant writ