Nothing's more useful than systemrescuecd. It'll boot up on any old [usb-bootable] and new x86 including recent macs.
Got firefox, gparted, fsarchiver (even more useful than PowerPoint!), terminal, midnight commander; hell, it's even got LTS kernels!
http://www.system-rescue-cd.org/System-tools/
Did I mention it's super-lightweight and boots fast AF?
EDITED: 15 Aug 2018 16:18 by DSMITHHFX