In case that you have recently bought your MacBook Pro computer and before you have used Windows based laptops, you have to know that some of the commands and the features can be unfamiliar to you. These devices differ from the operating system to the computer’s structure.
Mac OS X based notebooks are considered safer because you can get the virus infection harder than with Windows operating system based laptops. You have to know about MacBook Pro notebooks that contains three models such as 13”, 15” and 17 inches screen sizes. The numbers shows the display’s size and as higher is the number as bigger is the screen’s size which combines millions of colors and gives you a high quality image.

In case that appears problems with your computers hard drive, before you start the formatting process it is very important to save all your important files because you might lose them. You can also boot your notebook from an external hard drive. In this article you will find the steps that you have to follow in order to boot a MacBook Pro computer from external drive. This process requires pressing and holding down the proper buttons from the keyboard while the system is booting up. You have to know that you can use these instructions for any Macintosh computer model. It is important to make sure that the external drive is bootable and it is partitioned properly. Don’t forget to verify if it contains an installation of the Mac OS X. In case that your MacBook Pro is Intel based the connection happens via USB external hard drive or via FireWire. In Power PC based Macintosh the connecting process works only with FireWire.

In order to boot a MacBook Pro computer from external drive, firstly you have to attach the device to the computer. In case that the external drive needs an electrical outlet, make sure that you have inserted correctly the power cable into the source. Then you can turn on both of your device. The step number two is to attach the USB cable’s one end into the MacBook Pro’s USB port and the other end, connect it to the external drive’s port. The step number three is to eject any disks that you have in your MacBook Pro computer’s optical drive. This is an important step because the buttons combination that you will use later for the booting process is also available for DVD or CD ejecting. Then you have to turn on or restart the computer while you press and hold down the “Command”, “Control” and “Power” buttons from the keyboard until the computer is booting up. Thanks to this button combination the system will automatically ignore the normal startup disk and your MacBook Pro computer will boot up from the attached external drive.