3 Configuring virtual machines OS/2 Warp 4.5 Requires hardware virtualization to be enabled. We officially support MCP2 only other OS/2 versions may or may not work. Guest Additions are available with a limited feature set.1 Mac OS X Server VirtualBox 3.2 added experimental support for Mac OS X Server guests, but this comes with restrictions. Please see the following section as well as chapter 14, Known limitations, page 181. 3.1.1 Mac OS X Server guests Starting with version 3.2, VirtualBox has experimental support for Mac OS X Server guests. This allows you to install and execute unmodified versions of Mac OS X Server on supported host hardware. Whereas competing solutions perform modifications to the Mac OS X Server install DVDs (e.g. different boot loader and replaced files), VirtualBox is the first product to provide the modern PC architecture expected by OS X without requiring any “hacks”. You should be aware of a number of important issues before attempting to install a Mac OS X Server guest: 1. Mac OS X is commercial, licensed software and contains both license and technical re- strictions that limit its use to certain hardware and usage scenarios. It is important that you understand and obey these restrictions. In particular, for most versions of Mac OS X Server, Apple prohibits installing them on non- Apple hardware. Also, only the server versions of Mac OS X are designed to be used in a virtual environment as a result, VirtualBox does not support client versions of Mac OS X as a guest. These license restrictions are also enforced on a technical level. Mac OS X Server verifies whether it is running on Apple hardware, and most DVDs that that come with Apple hard- ware even check for an exact model. These restrictions are not circumvented by VirtualBox and continue to apply. 2. Only CPUs known and tested by Apple are supported. As a result, if your Intel CPU is newer than the build of Mac OS X Server, or if you have a non-Intel CPU, it will most likely panic during bootup with an “Unsupported CPU” exception. It is generally best to use the Mac OS X Server DVD that came with your Apple hardware. 3. The Mac OS X Server installer expects the harddisk to be partitioned so when it does not offer a selection, you have to launch the Disk Utility from the “Tools” menu and partition the hard disk. Then close the Disk Utility and proceed with the installation. 4. In addition, as Mac OS X Server support in VirtualBox is currently still experimental, please refer also to chapter 14, Known limitations, page 181. 3.1.2 64-bit guests VirtualBox supports 64-bit guest operating systems, even on 32-bit host operating systems,2 pro- vided that the following conditions are met: 1. You need a 64-bit processor with hardware virtualization support (see chapter 10.3, Hard- ware vs. software virtualization, page 157). 1See chapter 14, Known limitations, page 181. 264-bit guest support was added with VirtualBox 2.0 support for 64-bit guests on 32-bit hosts was added with VirtualBox 2.1. 40