Any Mac owner should know what to do if his/her computer refuses to turn on. Whenever you face such a situation you don’t have to give up and take your Mac to the nearest Apple Store immediately because there a number of steps that you can take to prevent yourself being embarassed.
Although some tend to let others solve their problems, there are other Mac users that want to know how to take care of their computer on their own. If you are such a person you should read the Apple support article describing this problem or read this so you will know the exact things you have to check for when your Mac refuses to start up.
Check the power cable
First of all, you have to make sure that you Mac is connected to a working power outlet. You may want to plug any other electric device in the outlet to give it a try. If the device does not work try another outlet and, if that works, connect your Mac using its power chord. If your Mac still isn’t starting up try the next step. More »
Are you always thinking that people might get their hands on your data and you do everything you can to make sure it is always safe and you are the only one that has access to it? If that description applies to you, then you have to know that Apple has a really neat trick in store for you.
If you want to prevent others from booting your machine and getting access to your data, you can use the firmware password protection features to easily set up a low-level password protection for your Mac.
The firmware password protection feature is off by default on all Mac machines and, according to Apple, the Open Firmware Password tool should be used only on Macs with Mac OS X 10.1 and later. Because Apple does not provide technical support or endorse using the Open Firmware Password Protection feature on earlier versions of Mac OS or with any third-party software utilities, you should be careful and first make sure that your Mac complies with this basic requirement.
On Intel and PPC based Macs, the firmware password protection is based on two different types of firmware: the Intel-based computers use the Extensible Firmware Interface (EFI) technology and the PowerPC processor-based machines use Open Firmware. More »