The Startup Disk settings page of Boot Camp is where you choose which operating system will start by default.
Boot Camp only works with Intel-based Mac systems, requires the latest Mac OS X OS (10.4.6) and must update the firmware. After the computer has been updated, you can download, install and run Boot Camp Assistant, the program will burn a driver CD for Windows, help you to reinstall the hard drive partition and install Windows XP.
On iMac tested machines, Boot Camp cleverly handles a variety of restart tasks that require Windows XP installation. Once the system is fully configured, you can press and hold the key while booting to select the OS you want to run. Boot Camp also installs a reference page of OS X and an XP Control Panel applet for you to select the default OS. In general, with Boot Camp, the system works like a real Windows PC in testing basic applications, exactly as you'd expect from a dual-boot machine. The download and installation of Firefox does not occur and iTunes downloads music easily from other computers on the network. Both wired and wireless networks work well. What about the speed of Boot Camp? Very impressive. The hardware of the iMac 20 tested similar to a high-end laptop, the app and game test results were as expected (see table).
In contrast, Parallels is still the same as a virtual operating system. The speed is slower although the environment is almost stable and can run applications that do not require heavy processing capability. This is not a solution for gamers, but for anyone who likes to experience new feelings with OS X, Parallels may be a good choice.