How to Turn off a Mac Start

Download the StartupSoundPrefPane from the website link listed below under Resources. Double-click the 'StartupSoundPrefPane11b2.dmg' disk image file to mount the disk image. Double-click on the mounted 'StartupSoundPrefPane' installer package and follow the instructions to install the software. You will need an administrator user name and password to install the preference pane.
Click the 'Apple Menu' in the upper-left corner of the Mac menu bar and select 'System Preferences.' Release the mouse click to launch System Preferences.
Click the 'Startup Sound' icon in 'System Preferences.' This icon is listed under 'Other' in the preferences.
There are two options in the 'Startup Sound' Preference pane. Click the 'Turn on Startup Volume Control' to make sure the check box is selected. To turn off the start-up sound, move the 'Startup Volume' all the way to the left, or select the 'Mute' button check box to mute the start-up sound entirely. Your Mac will no longer chime with a start-up sound.
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How to Clear All Private Data on a MacBook Pro

Click the 'System Preferences' icon in the dock. Then click 'Accounts.'
Click the lock icon and enter the administrator password.
Click the plus sign to create a new account. The new account type needs to be 'Administrator.'
Click the 'Apple' menu at the top of the screen and then click 'Log out.'
Log in to the new account.
Click the 'System Preferences' icon in the dock.
Click 'Accounts.'
Click the lock icon and then enter the administrator password.
Click the old account and then click the minus sign.
Click 'Delete the home folder.' Click 'OK' to clear all the private data from the old account.
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How to Become System Administrator on a MacBook

Add a new user to the Macintosh system. Click on the Apple menu in the upper left hand corner. Then go to the System Preferences and click on accounts. You will be prompted to enter the administrator password. Click on the Add button and type the new user's name and password.
Set parental controls for the user. It's possible to set parental control on any user account as the system administrator. The two most common parental controls are time limits and bedtimes. The time limits set a maximum amount of time allowed on a computer in a given day. Bedtimes establish off hours where access to the computer is prohibited.
Install new software on the Macintosh system. This task requires system administrator privileges. The most common method to install software on a Macintosh is done using fink. Simply type in the word 'fink' on the command line and enter the system administrator password when prompted.
Perform backups of important computer data. This is done using 'Time Machine.' With Time Machine, you could schedule automated backups as the system administrator so that the computer can be restored if the hard drive fails.
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How to Block a Website From an Apple Computer

Open the 'Applications' folder. Double click 'Utilities' and 'Terminal.' A command prompt will open.
Type 'sudo nano /etc/hosts' without the quotation marks and hit 'Return.'
Enter the Administrator password for the computer. This should bring you to a text file with the words 'Host Database' at the top.
Use the arrow keys on the keyboard to move the cursor down to the bottom of the file. Type '127.0.0.1 (website)' without the quotation marks. For example, if the website that you want to block is example.com, type '127.0.0.1 www.example.com.'
Hit the 'Control' and 'O' keys on the keyboard simultaneously, then hit 'Return' to save the file. Close the terminal window. The website that you have specified is now blocked. To remove the block, return to the Host Database using the steps outlined above, and remove the line referencing that website.
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How to Restart a Mac in Target Disk Mode

Log on to your computer with an administrator account.
Open System Preferences by clicking on the icon in the dock.
Go to the 'Startup Disk' control panel under the 'System' category.
Click on the 'Target Disk Mode' button and click 'Restart' to confirm your decision.
Connect your computer to another computer with a Firewire cable. When your computer restarts, it will enter target disk mode and will appear as an external hard drive on the second computer.
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