My computer runs Ubuntu 14.04, downloaded the latest Mate, attempting to install on a 4gb usb drive to install on my older laptop. I keep getting the message: Failed to install Boot Loader when it is close to being done writing to the usb drive. Im using Startup Disk Creator. Suggestions?
@wadesmart try to create sub drive with dd in your terminal:
sudo dd if=/path/to/ubuntu/iso of=/dev/sdX
where sdX can be found by using in terminal: lsblk. Be careful sdX must be the device not the partition, I mean do not put any numbers there 
Please forgive my lack lack of terminal knowledge:
sudo dd if=/Downloads/ubuntu-mate-15.10-desktop-i386.iso of=/dev/sdfX
sdf1 = /media/DaMachine/1030-414
1030-414 = usb drive.
So, sdf1 is a partition and Im to put sdfX?
And I put /dev/ not /media/DaMachine/
correct?
You will use:
sudo blkid
If you are sure that sdf1 = /media/DaMachine/1030-414 is your USB drive then you will use:
sudo dd if=/Downloads/ubuntu-mate-15.10-desktop-i386.iso of=/dev/sdf
without the number. Wait a couple of minutes until the procedure in terminal will be finished (you will see some diagnostics).
DaMachine@DaMachine:~$ sudo dd if=Downloads/ubuntu-mate-15.10-desktop-i386.iso of=/dev/sdf
2289280+0 records in
2289280+0 records out
1172111360 bytes (1.2 GB) copied, 457.5 s, 2.6 MB/s
The this comes up: "Sorry, could not display all the contents of “4FA7-909B”: Error when getting information of file ‘/media/DaMachine/4FA7-909B/-^’ (some stuff I cant write) output error.
I got that twice on two usb drives. Could my iso be bad or is that a indicator of something else?
Well, I guess I was wrong. It put it in my usb port on my laptop and its loading.
Thanks for your help. Much appreciated 
No problem. Hope this will work
Tried couple tools for creating bootable flash drive… non worked… finally your advice saved the day… Thanks.
i had already problems with ubuntu statup disk creator… but i hoped that the problem was solved… its crazy that such essential tool for spreading ubuntu is with a such bug (creates startup disk, but not possible to boot from that)…
anyway… thanks for the tip