Remix OS is an interesting desktopification of Android. It can run off a read-write-able USB stick but it doesn’t have an installer. I can boot it up in GNOME Boxes just fine, but as I’m just running an ISO file it’s not a persistent read-write system. How do I install from Remix OS’ ISO file onto the hard drive inside Boxes?
Press the TAB key at the first menu (where you would choose between running in "Resident" or "Guest" mode) and add INSTALL=1 to the boot parameters. Check here for more info: http://fatminmin.com/blog/install-remix-os-to-disk.html