Putting ubuntu on usb to put on macbook air 08

[SBHX]

So I thought I saw something else similar here on the forums. I found this little tip:

Unable to boot from Flash Drive on MacBook Pro (from 2009)

Hi - I had the same problem - apparently some of the older MacBooks don’t see the USB thumb drives at boot up - if you can, try burning the iso file onto a DVD -then power up holding down the option key (with the DVD in) - that worked for me. Good Luck

If you can get a hold of a blank DVD and burn the Linux Mint iso to it, that might be your best bet. I’m reading that older Macbooks won’t recognize USBs as a boot option.