On Sep 5, 2014, at 11:30 AM, Glen Barber <g...@freebsd.org> wrote:

> On Fri, Sep 05, 2014 at 11:20:21AM -0600, John Nielsen wrote:
>> I have a "MacBook Pro Retina, Mid 2012" (MacBookPro10,1) on which I'd like 
>> to be able to boot FreeBSD from an external USB drive. For testing I've been 
>> using the mini-memstick images from the -CURRENT snapshots, most recently 
>> the one from 20140903.
>> I am able to select "EFI Boot" on the USB device from the Mac's boot menu, 
>> and it does _something_, but the screen never changes--the image of the boot 
>> menu is displayed indefinitely. I think it is actually booting since there 
>> is drive activity and the caps lock key indicator starts working a few 
>> seconds in, but the screen just stays the same. Thinking the resolution of 
>> the Retina display may have been an issue, I tried booting with it disabled 
>> (lid closed) and an external monitor and keyboard. The result was the 
>> same--Mac boot menu frozen on the external display.
>> Is there anything I should try to troubleshoot or debug this issue? Anything 
>> else I should include in a PR? I can test patches if needed (probably after 
>> building an image including the patch from a VM).
> To be clear, which boot menu do you see?  If you see the FreeBSD loader
> menu, escape to the loader prompt and try:
>    set kern.vty=vt
>    set hw.vga.textmode=1
>    boot
> I am a bit unclear under which conditions 'hw.vga.textmode=1' is
> required, though.

No, I don't ever see the FreeBSD loader. I see the menu you get on a Mac when 
you hold down the option (alt) key while booting--big disk icons representing 
the bootable disks/partitions in the system. In my case it was the "Macintosh 
HD" volume (Mac OS Mavericks), my Windows partition, and the USB stick with the 
FreeBSD memstick image on it, which the Mac just called "EFI Boot" (and the 
icon was that of a USB disk). There is also a little section at the bottom that 
allows wifi network booting (if you've done all the black magic (not PXE) to 
get that to happen). It shows a circular activity animation while it scans for 
wireless networks. That animation stops when I select the USB EFI icon and 
press enter (and that is the only visual indication I get that I made a 


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