kernel loading text messages over the grey Apple logo screen

Discussions about using Mac OS X guests (on Apple hardware) in VirtualBox.

kernel loading text messages over the grey Apple logo screen

Postby takwing » 30. Jun 2010, 15:21

Dear VB team,

In order to get a more seamless boot up process of my MacOS X guest, I would like to see the grey screen with the Apple logo there in the boot up process.

To get the gret screen with Apple logo, I have added

<ExtraDataItem name="VBoxInternal2/EfiBootArgs" value=" "/>

to the machine's XML file (FYI, I am using VB's EFI option).

However, though I can see the desired screen, there are still some text messages displayed. Is there a way to have this resolved?
Attachments
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Re: kernel loading text messages over the grey Apple logo screen

Postby LeXa2 » 11. Jul 2010, 19:10

As I had already posted on the Insanely Mac forums, I suspect this to be the VirtualBOX EFI implementation issue: while original Apple Mac EFI refuses to display the text messages when the system had been switched to the graphical mode using GOP, VirtualBOX EFI acts just like the EGA/VGA videobios in old-good times still printing text messages no matter is the current video mode text or graphical.

Devs, any comments on this?
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Re: kernel loading text messages over the grey Apple logo screen

Postby stefan.becker » 11. Jul 2010, 19:13

MacOS is only allowed on MacOS. So you cannot get support here.
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Re: kernel loading text messages over the grey Apple logo screen

Postby Sasquatch » 11. Jul 2010, 19:26

The Guest OS boots, right? Then what's the big fuss? It's a VM, you can expect it to change differently than a native system. It's quite possible that the EFI on a Mac is under license and only a few parts are available under the Open Source license, just enough to get it to boot.
Read the Forum Posting Guide before opening a topic.
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Online User Manual: A must read if you want to know what we're talking about.
Howto: Install Linux Guest Additions
Howto: Use Shared Folders on Linux Guest
See the Tutorials and FAQ section at the top of the Forum for more guides.
Try searching the forums first with Google and add the site filter for this forum.
E.g. install guest additions site:forums.virtualbox.org

Retired from this Forum since OSSO introduction.
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Re: kernel loading text messages over the grey Apple logo screen

Postby LeXa2 » 11. Jul 2010, 20:05

Sasquatch wrote:It's quite possible that the EFI on a Mac is under license and only a few parts are available under the Open Source license, just enough to get it to boot.

It is certainly under license as the U(EFI) specification itself is. And even more - Apple's implementation of the EFI most probably is closed-source and unavailable to anyone outside the Apple Inc. Another thing to note is that the original Apple firmwares do not follow the U(EFI) implementation closely: prior to the EFI boot manager startup Apple's firmwares launch specialized Apple's bootloader capable of detecting HFS+ volumes available to the system and starting up boot sequence from the 'blessed' one volume.

The fuzz in this topic is just a feature-request (IMO very minor one): it is always good to make the things look good. For example would it be cool if the VBOX would boot up WinXP normally but only support 640x480 resolution? Just the same here: if there would be a possibility to achieve cool-looking bootup picture just like it looks like on the original hardware. Nothing more.

In any case my preference would be Mac OS X guest additions at the first place, as they are more important from the point of the general system usage.
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