How Do I Unregister My Mac?

Click the 'Apple' icon in the upper-left corner of the desktop and click 'System Preferences.'
Click 'MobileMe' in the Internet & Wireless section and click the Sync tab. Click 'Advanced' in the bottom-right corner of the MobileMe window.
Click the name of your computer in the account synchronization window and click 'Unregister' to remove the computer from MobileMe's registration.
Click 'Done' and close the MobileMe window to apply and save the new settings.
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How to Turn Off the iSight Light on an iMac

Close the iChat, iMovie and Photo Booth applications. If you don't see them open, search for them by typing in 'Photo Booth' (or the other applications) in the Finder at the top right of your screen, then opening the application.
Select 'Photo Booth' (or the other application names) from the menu that appears in the top left of your screen, then click 'Quit Photo Booth.' If you do this for all three applications, you should be able to turn off the iSight light.
Open your System Preferences folder by typing 'System Preferences' in the Finder menu. Select 'System Preferences' from the list of options that appear, then select 'Accounts' and 'Login Items.' View the list of items that are set to open upon Login. If Photo Booth, iMovie or iChat are on the list, deselect them by clicking the arrow next to the item. That may have been causing your iSight light to be on all the time.
Click the 'lock' item in the bottom left of the Accounts pane to save your changes, enter in your Mac username and password to confirm the changes, and click 'OK.' Your camera light should not turn on and be left on now, unless you open Photo Booth, iMovie or iChat.
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How to Set a Password on a MacBook (6 Steps)

Click the 'Apple' logo in the upper-left corner of the screen.
Click 'System Preferences.'
Click 'Accounts.'
Click 'Change password.'
Enter the old password, if any, and enter the new password into both the 'New password' and 'Verify' boxes.
Enter a password hint, if desired, and click the 'Change Password' button. The changes take effect immediately.
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How to Change the Default Wi

Launch 'System Preferences' from the Apple menu in the top left corner of the screen.
Select the 'Network' preference pane and click on the 'Advanced' button.
Drag the available networks in the 'Preferred networks' window to their desired order of importance. The network on the top of the list will always be the default Wi-Fi network when available.
Click on 'OK' to exit the screen and click on 'Apply' to save your changes.
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How to Invert Color on a MacBook Pro Monitor (7 Steps)

Click the 'Apple' menu at the top of the screen and then click 'System Preferences.'
Click 'Universal Access' in the 'System Preferences' window.
Click 'Seeing' in the 'Universal Access' window to view a list of visual options.
Click 'White On Black' in the 'Display' section of the window to invert the color of the display.
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How to Change the Administrator Name on a Mac

Login to your Mac using the administrator account. To do this, select the administrator account from the login screen. Depending on your settings, you may need to enter the administrator password. If you are already logged in with another account, then first select 'Log Out [Account name]...' from under the Apple Menu at the far left of the top menu bar.
Open the System Preferences application. This program is located by default in your Applications folder, but you may have moved it somewhere else. The appearence of the icon varies depending on what version of Mac OS you are using. In Mac OS 10.5, its icon looks like three gears in a silver-colored box, but in earlier versions of Mac OS X it may look like a light switch.
Select 'Accounts' in the System section. The Accounts icon looks like the silhouettes of two people, and is usually at the beginning of the fourth row of icons, under the 'System' header. Click on the icon.
Select the administrator account from the list on the left of the Accounts window. Administrator accounts say 'Admin' under the account name. Change the administrator status of an account by checking or unchecking the 'Allow user to administer this computer' box. If there is only one account, it will have administrator privileges by default.
Change the text in the 'Name' field to the new administrator name. Enter the administrator password to confirm the change.
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How to Turn on a Mac Camera for Skype

Open Skype.
Click on the 'Skype' menu tab at the top of the screen once the program opens.
Click 'Preferences.'
Click on the 'Video' option.
Check the box next to 'Enable Skype Video.'
Click on the box next to the 'Camera' option. Click 'Built-in iSight' to enable the Mac's camera in Skype.
Check the box next to 'Start my video automatically' under the heading labeled 'When I am in a call.' Close the Preferences window when finished.
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How to Enable Right Click on an Apple Mouse

Make sure your wired Apple mouse is plugged into a USB port on your computer or your wireless mouse is connected via Bluetooth.
Click on the 'System Preferences' icon in the Dock.
Go to the 'Mouse' control panel in the Hardware section.
Open the drop-down menu on the right side of the window. The menu will be set to 'Primary Button' by default.
Change the drop-down menu setting to the 'Secondary Button' option. This will instruct the system to recognize right-clicks.
Close the System Preferences window to save the settings. Now when you press on the right side of your mouse's surface, the computer will treat it like a right-click.
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How to Reset an AirPort Card (4 Steps)

Click the 'System Preferences' tab in the lower left corner of the dock.
Select 'View,' then click 'Network.' Once the new selections appear, click 'Show,' then 'Network Port Configurations.'
Deselect the 'AirPort' option, then choose 'Apply Now.'
Select the 'AirPort' option and click 'Apply Now,' then exit out of 'System Preferences' to complete the reset.
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How to Zoom With a MacBook Pro Trackpad (3 Steps)

Use two fingers to touch the trackpad. The MacBook Pro trackpad makes manipulating documents and applications easy, but three fingers and four fingers have other functions. To zoom in, you need only two fingers.
Zoom in on the current document by pinching outward on the trackpad with the either two fingers, or your thumb and forefinger. Zoom back out by pinching inward.
Modify your trackpad preferences if you find the trackpad too sensitive to your touch or not sensitive enough. Select 'System Preferences,' and then select 'Trackpad' from the Hardware options. Click the 'Point & Click' tab to modify the speed of response to your hand movements. Select 'Scroll & Zoom' to disable the zoom feature.
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How to Find Windows Home Server on MacBook Pro

Open 'System Preferences' in the Apple menu. Go to 'Sharing.'
Check 'File Sharing' in the list of options.
Open the Finder's 'Go' menu. Click on 'Connect to Server.'
Input the Windows Home Server IP address (see Tips) and press 'Connect.'
Enter the name and password of your Windows Home Server into the proper fields. Press 'Connect.'
Open 'Network' in the Finder’s 'Go' menu. Windows Home Server will show up as an option to connect with. You can now find Windows Home Server with a MacBook Pro.
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How to Turn Off Sticky Keys on a Mac (6 Steps)

Click the Apple logo on the menu at the top of the screen.
Click 'System Preferences.' The System Preferences window will open.
Click 'Universal Access.'
Click the 'Keyboard' tab.
Click the 'Off' option next to 'Sticky Keys.'
Click the red circle at the upper left of the window to close it.
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How to Change an Apple Computer's Background to Black and White

Find the 'Apple Menu' icon. This is located at the top left corner of your screen.
Select the 'System Preferences' menu.
Click on the 'Universal Access' icon. It's on the last row to the far right.
Choose the 'Keyboard Shortcuts' menu.
Press the 'Switch to White on Black' push button.
Push the button again to return screen to black on white.
Adjust the contrast by moving the 'Enhance Contrast' button between 'Normal' and 'Maximum.'
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How to Troubleshoot MacBook iSight

Click on the Apple logo in the top left of the screen and select 'Force Quit.' Select the open program you are trying to use 'iSight' with and select the 'Force Quit' button. Launch another application that uses iSight, such as 'Photo Booth' or 'iMovie.' If the camera functions with the new program but not the first program tried, proceed to Step 2.
Reopen the initial program you tried to use the camera with. Locate the 'Camera' settings option either on the menu bar across the top of the screen or by clicking 'File' and 'Preferences.' Verify that the iSight camera is the default camera. If the camera still does not function, proceed to Step 3.
Click on the 'Finder' icon in the 'Dock' at the bottom of the screen and select the 'Applications' folder. Under 'Applications,' click on the 'Utilities' folder followed by 'System Profiler.' Locate the 'USB' heading in the left side column and click on it. Look for the 'iSight' entry. If the entry is present, the camera should be functioning. If it is not present or the camera still does not function, proceed to Step 4.
Click the Apple logo at top left of screen and select 'Sleep.' Press any key to wake the computer and try the camera again. If it does not work, select 'Restart' from the Apple logo options and try again. Finally, select 'Shut Down' and allow the computer to power down. Power on the computer, and try the camera once more. Proceed to Step 5 if the issue is still not resolved.
Shut down the computer. Disconnect the power supply cable. Turn the MacBook over and remove the battery. If the battery is inside the case and not removable without taking off the backing, simply skip the battery removal.
Press and hold down the 'Power' button for five seconds. Replace the battery and reconnect the power cable. Press the 'Power' button once more to turn the MacBook back on. This will reset the 'System Management Controller' or 'SMC.'
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Backing up a MacBook With Tiger (15 Steps)

Quit the Mail application if it's running, and then create a new empty folder on your MacBook's desktop. To do this, press 'Control' on your keyboard, click an open area on the desktop and click 'New Folder' on the pop-up menu that appears.
Launch the Finder application and choose 'Home' on the Go menu.
Click the 'Library' folder, and then click the 'Preferences' folder.
Press and hold the 'Option' key on your keyboard, and drag and drop the 'com.apple.mail.plist' file into the desktop folder you created in Step 1.Holding down the Option key while dragging and dropping a file creates a duplicate of the file.
Close the Preferences folder, and then click the 'Mail' folder.
Press and hold the 'Option' key, and then drag and drop the 'MessageRules.plist' file into the folder you created in Step 1. Repeat this procedure for the 'SmartMailboxes.plist' and 'Signatures' files as well.
Choose 'Home' on the Go menu.
Click the 'Library' folder. Press and hold the 'Option' key, and drag and drop the 'Mail' file into the folder you created in Step 1.
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How to Open a Port on a MacBook

Click 'System Preferences' from the Dock and select the 'Sharing' icon.
Check each box to enable sharing for the type of content you want to share. For example, check the 'File Sharing' box to enable File Sharing.
Select the 'All Users' radio button to allow access to anybody. Select 'Only These Users' to allow access to only the listed users. If you want to add users, click the '+' button, select a user or group from the Users & Groups list and click 'Select.'
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How to Make a MacBook Pro Output in Mono

Click on the 'Apple' icon located on the left side of your menu bar.
Select 'System Preferences' and choose 'Accessibility.'
Click the 'Audio' tab under the Hearing category.
Check the box that reads, 'Play stereo audio as mono.' This sends mono audio to both the left and right sides of your speakers and headphones.
Close the Accessibility window and your settings will be automatically saved.
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How to Set Up a Wireless Printer on a Mac (9 Steps)

Select your Wi-Fi network using the printer's built-in controls. You may be prompted to enter your network username and password if it is a secured network.
Install on your Mac the necessary printer driver from the CD that came with your printer. If no CD came with your printer, go to the manufacturer's website and download the software for your printer model.
Select 'System Preferences' from the Dock.
Select the 'Print & Fax' control panel in the Hardware section.
Click the '+' icon on the left side of the control panel.
Select the 'IP' tab at the top of the pop-up window and choose 'Internet Protocol IPP' from the list of available protocols.
Type in your wireless printer's IP address and queue name.
Select the correct printer driver from the 'Print Using' drop-down menu.
Click the 'Add' button to finish setting up the wireless printer. The printer will now show up as an available device the next time you print a document.
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How to Change BIOS

Open the 'Apple' menu and click 'System Preferences.'
Click the 'Startup Disk' icon in the 'System' section.
Click the system you want to use. To start Windows by default, click the 'Windows on BOOTCAMP' option. To start OS X by default, click 'Mac OS X.' Click 'Restart' to restart in Windows, or close the 'System Preferences' Window.
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How to Connect a Macbook Pro to a MIDI Controller Keyboard Play Through an Amp

Plug one end of the MIDI cable into the 'MIDI Out' port on the MIDI controller keyboard. Plug the other end of the MIDI cable into the 'MIDI In' port on the audio interface.
Plug one end of the TRS cable into one of the 'Left Output' TRS jack on the audio interface, and plug the other end of the TRS cable into the 'Left Input' on the keyboard amp. Use the other TRS cable to connect the 'Right Output' on the audio interface to the 'Right Input' jack on the keyboard amp.
Turn on the Macbook Pro and click the Apple menu, then 'Preferences,' then 'Sound.' Click the 'Input' tab and select your USB or Firewire audio interface from the drop-down menu.
Click the software synthesizer's desktop icon to launch it. Alternatively, click 'Go,' then 'Applications,' and select your software synthesizer from the applications list.
Click 'MIDI Channel' in the software synthesizer and set it to '1.' Some applications allow you to open multiple software synthesizer tracks, in which case you should assign the MIDI channel on the 2nd track to '2,' and assign the MIDI channel on the 3rd track to '3.' MIDI allows up to 16 assigned channels at once.
Press 'MIDI Channel' on your keyboard and set it to '1.' If you have assigned multiple MIDI tracks to different channels, then the keyboard can switch between MIDI tracks by switching channels. This means you don't have to interrupt a performance to change MIDI tracks.
Click 'Options' or 'Preferences,' then 'Output' in the software synthesizer, and select your USB or Firewire audio interface as the output device if it is not already selected.
Turn the volume all the way down on the keyboard amp, then turn the keyboard amp on. Press a key on the keyboard, turn the volume up gradually, and listen for a sound.
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