Problem with startup `rc.local` script Until OS X 10.9 I could also run Bootcamp within Virtualbox (through a .vmdk file). In order to do this, I needed to unmount the Bootcamp partition after changing the permissions during the OS X startup process in the rc.local file. Now, with OS X 10.10 rc.local does not seem to work anymore and I cannot start my virtual machine without first manually execute the terminal commands that are in my rc.local script.

Here is my rc.local content:


  sudo chmod 777 /dev/disk0s4
  diskutil unmount /dev/disk0s4


I understood that rc.local is not supported anymore in Yosemite and launchd should be used instead. Source:: How To: Run Windows 7 (Bootcamp) in VirtualBox.

Can someone help me with a valid script and show me how to use it?
I was using those commands for VirtualBox in rc.local, and I ran into the same problem.  I don't if this is the right way to do this, but it works for me.

I created /Library/LaunchDaemons/local.localhost.startup.plist containing the code below.  It runs the rc.local script once at start up.

&lt;?xml version="1.0" encoding="UTF-8"?&gt;
&lt;!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"&gt;
&lt;plist version="1.0"&gt;
&lt;dict&gt;
    &lt;key&gt;Label&lt;/key&gt;             &lt;string&gt;local.localhost.startup&lt;/string&gt;
    &lt;key&gt;Disabled&lt;/key&gt;          &lt;false/&gt;
    &lt;key&gt;RunAtLoad&lt;/key&gt;         &lt;true/&gt;
    &lt;key&gt;KeepAlive&lt;/key&gt;         &lt;false/&gt;
    &lt;key&gt;LaunchOnlyOnce&lt;/key&gt;    &lt;true/&gt;
    &lt;key&gt;ProgramArguments&lt;/key&gt;
        &lt;array&gt;
            &lt;string&gt;/etc/rc.local&lt;/string&gt;
        &lt;/array&gt;
&lt;/dict&gt;
&lt;/plist&gt;