How to Erase Memory on MacBooks

Attach the drive your wish to erase and format to your machine if it is not connected already.
Launch a Finder window, click 'Applications', then 'Utilities'. Double-click the 'Disk Utility' application shortcut.
Click a disk in the Volumes section. Select the Volume type from the 'Volume Format' drop-down box.
Click the 'Security Options' button, then click to select the 'Zero All Data' check box. Click 'OK' then click the 'Erase...' button.
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How to Do a Dual Screen on an iMac (9 Steps)

Determine the type of video connection used with the external monitor you wish to connect to the iMac. The iMac features a Mini DisplayPort on the back of the monitor that supports DVI, VGA and dual-link DVI connections through the use of different adapters. DVI and VGA are two of the most common connections used with computer monitors. The type of connection your external monitor uses should be printed beneath its connection port (see Resources).
Plug in the appropriate Mini DisplayPort adapter for your monitor. The Mini DisplayPort connector is located in the lower-left corner on the back of your iMac to the right of the USB cable and ethernet cable inputs (see Resources).
Turn on the external monitor and the iMac computer.
Connect the external monitor's connection cable to the Mini DisplayPort adapter that you connected to the back of the computer.
Click the 'Finder' icon on the iMac Dock and then click the 'Applications' folder. Click 'System Preferences' to open the 'System Preferences' dialog box. Click 'Displays' beneath the 'Hardware' subheading to bring up the 'Display Settings' dialog box.
Click 'Detect Displays' in the lower-right side of the dialog box to force the iMac to detect the external display. Once the computer detects the external display, select the 'Arrangement' tab. Two boxes will appear in the dialog box, representing your monitors. The box with the white bar across the top of it represents the iMac monitor while the other box represents the external monitor.
Drag the box that represents your external monitor to the appropriate side of the box that represents your iMac monitor. For example, if your external monitor is on the left side of your iMac, drag the box representing the external monitor to the left side of the box representing the iMac monitor.
Place a checkmark next to the 'Mirror Displays' option in the lower-left corner of the 'Arrangement' dialog box if you want to use the external display to mirror the iMac display. Remove the check mark from the 'Mirror Displays' option if you want to use the external display as an extended display. This means that the monitor will act as an extension of your iMac's desktop, letting you drag the mouse cursor from one screen to the other. You can display programs, movies, applications or anything else on the second monitor to free up space on the iMac's main screen.
Close the 'Display Preferences' window to save the changes.
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How to Apply Parental Controls on iPhone and iPod Touch

Turn on the iPhone or iPod touch and tap the 'Settings' icon on the home screen.
Select the 'General' option and then tap 'Restrictions.'
Press the 'Enable Restrictions' button. You are prompted to create and enter a 4-digit restrictions passcode twice. This is different from the passcode lock feature.
Configure the 'Allow' section first. Use the 'On/Off' sliders to the right of each listing to allow or disallow use of Safari, YouTube, Camera, FaceTime, iTunes, Ping, Installing Apps and Deleting Apps.
Select 'Location' in the 'Allow Changes' section where you can limit the mobile device's ability to report the child's location to applications. Tap 'Accounts' to stop or permit changes in Mail, Contact and Calendars.
Review the 'Allowed Content' section. Here you can turn In-App purchases on or off. You can allow or restrict explicit lyrics in music, control access to movies and television shows and limit apps to specific age groups. Additionally, you can restrict participation in the Game Center.
Press the 'Home' button under the display screen to return to the mobile device home screen. The restrictions remain in place until you turn them off in the 'Settings' menu.
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How to DJ With a MacBook (3 Steps)

Djay is a downloadable DJ software program for Mac OS X that uses your iTunes library to let you cue up songs, create endless loops and seamlessly fade and transition between songs. The interface is designed to visually simulate the classic 'two turntables and a microphone' setup of an old school DJ. Choose a song from your iTunes library and Djay will begin to a play the song, allowing you to loop a beat at any point in the song, match tempo and beats with another song cued up, and fade between the two with an easy to use interface. The program has an auto pilot function, which mixes music and playlists automatically, and has a record function for recording mixes and podcasts.
Ask The DJ is a free automatic DJ program available for download that uses iTunes to create hours of uninterrupted play, based off of keywords you type into the engine. Ask The DJ scans your iTunes library, analyzing tracks for similar genres and beat patterns, then matches and mixes beats, as well as synchs volume level to create a seamless, continuous groove. As Ask The DJ is a very 'hands off' program, it is excellent for occasions where you don't want to have a live DJ or worry about changing records yourself.
AccuBeat Mix is an simple, easy to use beat and mix software application for Mac that is available as a download from the internet. The program allows users to mix and match beats seamlessly, manually or automatically. Though it lacks some of the fun, visual features of a program like Djay, it is available as a free demo, and the entire program can be purchased for cheap.
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How to Use a DVD

Open the DVD drive on your computer. You can see there is a small tray indentation for mini discs. Place the DVD-R 8cm onto the mini tray and close the drive. In a moment the content on the disc loads onto your screen.
Access content on the DVD whenever you want by clicking 'Start,' (My) 'Computer,' and double-click the DVD drive icon. This opens a window with all the programs and files currently stored on the disc. This is typically how you access video footage created with DVD video cameras.
Launch the DVD burning program on your computer. You can still use a DVD-R 8cm to create data and video DVDs, however you can only hold about a third of the actual data that a standard sized DVD can hold.
Eject the DVD from the computer by pressing the 'Eject' button. When the DVD tray opens remove the mini DVD from the computer.
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How to Connect a TV to a Mac (12 Steps)

Locate the VGA connector on the back of the TV labeled 'PC' or 'RGB.'
Connect the VGA cable from the Mac to the TV.
Use the TV's menu option to select 'PC input'.
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How to Clean a MacBook Trackpad Button

Lightly dampen a piece of cloth with some plain water.
Wipe down your MacBook's trackpad with the cloth. Use broad strokes to ensure that you're catching as much grease and grime as possible.
Continue wiping until no discernable grease can be seen on the trackpad.
Take your paper or similarly thin wedge and work it gently into the perimeter of the MacBook's trackpad. If your MacBook doesn't feature a rubberized plastic bottom, run the wedge between the trackpad's mouse buttons. Newer MacBooks feature the same single trackpad-mouse button that's used on the MacBook Pro line of computers, but older models utilize a dedicated mouse button.
Continue running this wedge around the perimeter of the MacBook's trackpad and in between the mouse buttons, if your model features them. Your goal is to dislodge any crumbs or grime that has collected between the computer and trackpad. Brush aside any removed dirt to finish the cleaning process.
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