Mac OS X Guest Virtual Box in Windows Host Full Screen

Is there a way to make the Mac OS X guest OS adapt the resolution of the host OS given that there's no guest additions yet as of the moment?

setzamora

Posted 2010-08-18T06:27:11.370

Reputation: 381

Answers

There is no way for it to automatically adjust, but you can specify a custom resolution for the guest to use.

You can manually edit the VirtualBox configuration, and the boot file in OS X to use a custom resolution. It's a two part (Host VM/Guest) process to enable the resolution.

Here are the steps:

First, make sure VirtualBox is not running. Close it if it is.
Add the following setting to the <ExtraData> section of your VM's XML file (location C:\users\<username>\VirtualBox VMs\<OS_NAME>\<OS_NAME>.vbox-prev):

<ExtraDataItem name="CustomVideoMode1" value="1680x1050x32"/>

You can change the value above to your preferred display resolution, e.g. 1280x1024x32.
Save the file and start your VM.
In Mac open the /Extra folder in the Finder.
Drag the com.app.Boot.plist file to the desktop.
Open the file on the desktop in the editor.
Locate the <key>Graphics Mode</key> entry, following that there should be a <string>xxxxxx</string> entry. Edit this entry to match the Custom Video entry from step 2 above. i.e. <string>1680x1050x32</string>
Put file back, Restart your VM and the new display resolution should be effective.

Good Luck!

Jason Stevenson

Posted 2010-08-18T06:27:11.370

Reputation: 316

@T.Todua: (1) Why do you suggest editing <OS_NAME>.vbox-prev instead of <OS_NAME>.vbox? (2) What do you mean by "Put file back"? – G-Man Says 'Reinstate Monica' – 2017-01-16T06:37:43.070

This doesn't work. The only thing that seems to make a difference is using the solution described here: http://martinml.com/en/how-to-install-mac-os-x-snow-leopard-in-virtualbox/

– user41270 – 2011-06-14T07:42:43.203

This definitely doesn't work, the copy on the desktop is just ignored. See http://superuser.com/questions/478901/change-macos-x-guest-screen-resolution-for-virtualbox for a more up-to-date method.

– Sam Salisbury – 2013-03-11T15:19:39.837

That should help solving your problem.

open this link
go down to Step 7: Make the Screen Bigger

Note: Install Multibeast 4.6.1 first (registration required)

thephoenix

Posted 2010-08-18T06:27:11.370

Reputation: 11

This is a bit late, but none of the other answers helped me. This video helped me. The instructions are very simple:

Power off your VM
Close VirtualBox, and any background processes (if applicable).
In the following code, edit "VM Name" to be your VM name and "N" to be 0 for a screen resolution of 640 x 480, 1 for 800 x 600, 2 for 1024 x 768, 3 for 1280 x 1024, 4 for 1440 x 900, and 5 for 1900 x 1200:

cd "C:\Program Files\Oracle\Virtualbox"

VBoxManage setextradata "VM Name" VBoxInternal2/EfiGopMode N
Run the code in command prompt as admin

That should get the job done. If anything is unclear, check out the linked video.

abagh0703

Posted 2010-08-18T06:27:11.370

Reputation: 103