Normally, it allows Mac OS X to work better with your computer's graphics card. Uncheck Graphics -> GraphicsEnabler=Yes.However, both audio and ethernet should already work by default in Virtualbox, so neither of these options is really necessary. Normally, they will allow Yosemite Zone to automatically detect your computer's audio codec and ethernet controller, and install the appropriate kexts so that your audio and internet will work immediately in Mac OS X. These two options are checked by default. Uncheck Install Audio Drivers (Kexts) and Install Network Drivers (Kexts).The are only two things you need to change: The default selection will enable Mac OS X to boot from the virtual machine without any assistance. Replace 'Name of virtual machine' with the name of your virtual machine (no quotation marks)- you can find the name of your virtual machine in the left pane of the Virtualbox main window. This command activates 'vboxmanage', a command-line program included with Virtualbox that allows you to edit the properties of your virtual machine, including its built-in resolutions.

This command will change the focus of the Command Prompt to the program folder for Virtualbox (if you installed Virtualbox somewhere different, then change the command to wherever you installed it). You can do this by opening the Start Menu, and typing 'command prompt' into the Start Menu search bar. Then, type the following command into the Command Prompt. To do this, open the Command Prompt in Windows (make sure you are logged into an Administrator account on Windows). If this is this case, you will have to trick Virtualbox into thinking that your processor is actually an older model. if your computer was built/bought in 2013 or later). NOTE 2: Virtualbox may have problems booting Mac OS X if your computer uses an Intel Haswell processor (i.e. Type the boot flag '/amdfx' (also without quotation marks) if your AMD processor has 'FX' in its model name.

NOTE 1: If your computer uses an AMD processor, you will have to type the boot flag '/amd' or '/amd64' (without quotation marks)- which flag you need depends on your specific processor, so test one flag at a time.

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