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<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE topic PUBLIC "-//OASIS//DTD DITA Topic//EN" "topic.dtd">
<topic xml:lang="en-us" id="efibootargs">
<title>Specifying Boot Arguments</title>
<body>
<p>It is currently not possible to manipulate EFI variables from within a running guest. For example, setting the
<codeph>boot-args</codeph> variable by running the <userinput>nvram</userinput> tool in a Mac OS X guest will
not work. As an alternative method, <codeph>VBoxInternal2/EfiBootArgs</codeph> extradata can be passed to a VM in
order to set the <codeph>boot-args</codeph> variable. To change the <codeph>boot-args</codeph> EFI variable, use
the following command: </p>
<pre xml:space="preserve">VBoxManage setextradata "VM name" VBoxInternal2/EfiBootArgs <value></pre>
</body>
</topic>
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