Macbook Pro 12,1 with OS X 10.11.6; installing using Ubuntu 16.04.2-desktop-amd64.iso
Trying to install Ubuntu 16 to a USB hard drive, for use with my Macbook Pro, which I have set up with Boot Camp and Windows 10. So I put the installer on a USB stick, booted using it, and set stuff up in the partition manager as per this photo.
(Why am I adding an EFI partition? Because it had already gone wrong once, and I thought I'd try again, this time taking photos, and wondered whether maybe adding an EFI partition to the USB hard drive would help it decide to do the right thing. Anyway, I'm the one asking the questions here.)
Note device selected for boot loader installation.
That all seemed in order, so I clicked
Continue and let it install. And what ended up happening was that the boot loader was installed on
/dev/sdd1 was left blank.
This made a bit of a mess:
Switch on with USB hard drive connected: Ubuntu boot menu appears, with an option for Ubuntu and an option for Windows 10 (which works). No sign of OS X
Switch on with USB hard drive disconnected: grub text console. I don't know how to use this, because when I typed
helpI got several pages of output that immediately scrolled away and I decided life was too short
Switch on while holding Alt: standard Apple boot menu appears, allowing selection of OS X and Windows as before. But even when USB hard drive is connected, there's no sign of Ubuntu
It's fairly easy to remove the loader (mount EFI partition and remove the
ubuntu folder there), so now I'm back where I was.
But I'm still a bit confused. What, if anything, did I do wrong? Why did the loader end up on
/dev/sda1 rather than