Install to external (I think) SSD

[Xen]

Grizzly schreef op 30-07-2017 9:24:

> I managed to get Xenial on that same SSD and it boots on all my lappies 
> &
> deskies but is not even seen (by boot option key?) on the MacBook

So you need a special HFS+ partition as said.

Makes sense to me.

The Mac will look for such a partition and a "mach_kernel" file and then 
tries to find an icon to show to its user.

It also locates the EFI firmware that way.

But you haven't told us whether you installed in EFI mode or not (I 
suppose there is only EFI mode).