How to Turn Off Numbers Lock on a Mac

Click on the Apple logo and select 'System Preferences.' Then, select 'Universal Access' in the System category.
Click on the 'Mouse' tab. Select 'On' next to 'Mouse Keys.' Pressing the numbers on the number pad will move the mouse as if the numbers were arrow keys. The number 8 moves the mouse up; 2 moves the arrow down; 4 moves the arrow to the left; and 6 moves the arrow to the right.
Click on 'Press the Option key five times to turn Mouse Keys on or Off' to enable the shortcut for essentially turning on and off Num Lock. Close 'System Preferences.'
Press the 'Option' key five times. Mouse keys will be enabled. Pressing the numbers on the number pad will move the mouse.
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How to Reset PRAM NVRAM on the MacBook Pro

Turn off your MacBook Pro computer.
Prepare to press the 'Command,' 'Option,' 'P' and 'R' keys. You will need to press all four of these keys in unison immediately before your MacBook completes its boot cycle.
Turn on your MacBook Pro.
Press and hold 'Command,' 'Option,' 'P' and 'R.' Your MacBook Pro will reset your PRAM and NVRAM, and will restart.
Continuing holding down the keys until you hear the Mac startup sound.
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How to Reset MacBook Memory

Shut down the MacBook by clicking the Apple Menu and clicking 'Shut Down.'
Start the MacBook and immediately hold down the 'Option,' 'Command,' 'R' and 'P' keys.
Release the keys when the MacBook restarts on its own.
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How to Increase the Memory for a Macintosh Application

Single-click the icon for the application to which you want to allocate more memory. Be sure to exit the application first.
From the File menu choose Get Info, or press the keys Command-I.
In OS 8.5 and later versions, select Memory from the Show menu in the box that appears.
Type a new value into the Preferred Size box, perhaps 1.5 or 2 times the suggested size shown. You can decrease the memory in the same way.
Click the close box. Your change will take effect the next time you launch the application.
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How to Stop the Spinning Wheel on Apple

Use the keystroke sequence 'Command+Option+Escape' if the spinning wheel does not resolve itself after 30 seconds. The resulting list of programs currently running will indicate which one is not responding. Select the offending program with your cursor and click the 'Force Quit' button at the bottom of the list.
Restart the computer while holding down the 'Command+S' keys if you experience persistent spinning wheels. Keep pressing until you see the gray screen with the Apple logo, then release. The screen will now be black and display lines of data. At the end of the text will be an old-fashioned computer prompt. This is 'single-user 'mode and allows you to fix problems in the underlying software. Type the command 'fsck -y,' including the space, and press 'Enter.' This will fix minor file errors and often cure the beach ball problem.
Open the Disk Utility program in the Utilities folder on your hard drive. Select the main drive in the window presented and click the button 'Repair Permissions.' This will fix aberrant behavior in some programs that have had their read/write status corrupted for some unknown reason.
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How to Restart a Frozen Mac

To attempt to save work in any applications other than the one you have running, you can force-quit the current application. Press these keys at the same time: Command-Option-Escape. Your unsaved work in the current application will be lost.
If you can, save work in all other programs.
Restart the computer by pressing the Power key or choosing Shut Down from the Special menu.
If that doesn't work, to shut down or restart the entire computer, press these keys: Command-Option-Shift-Power. All unsaved work will be lost.
To force the computer to restart, press these keys: Command-Control-Power.
If nothing else works, unplug the computer or turn off its power strip.
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How to Take a Snapshot on Skype With a Mac (5 Steps)

Click on the Skype window that you want to take a snapshot of to make sure it is fully visible at the front of your screen.
Hold down the Command and Shift keys on your Mac keyboard, and press the '4' key. Your mouse cursor should now appear as a crosshair icon on your screen.
Press the space bar on your keyboard, and the crosshair icon will change to an icon that represents a camera.
Hover over the Skype window that you want to take a snapshot of, and it will be highlighted in blue.
Left click your mouse, or click your trackpad button to take the snapshot. The snapshot of your selected Skype window will appear as a JPEG file on your desktop.
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How to Forcibly Quit a Program in MacBook (6 Steps)

Hold down the 'Command-Option-Esc' keys on your keyboard simultaneously to open the Force Quit Applications window.
Highlight the program in the list that you want to forcibly close.
Click the 'Force Quit' button in the lower right corner of the Force Quit Applications window.
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How to Turn on Backlight on a MacBook Keyboard

Close your Internet browser if you currently have one open on your MacBook, as one of the function keys used for your backlighting is often commonly used by browsers.
Press 'F9' to turn the keyboard backlight on, if it is currently turned off. You can adjust the brightness from dim up to its maximum backlighting by pressing the 'F9' button several times.
Press 'F10' if you need to adjust the backlight so that it is dimmer. Press 'F8' to disable backlighting.
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How to Reset the iTunes Store Cache

Open iTunes, and then press the 'Alt-X' keys to display the menu bar.
Open the 'Edit' menu, and then select 'Preferences.'
Click the 'Advanced' tab, and then click the 'Reset Cache' button beside 'Reset iTunes Store Cache' in the bottom half of the window.
Click 'OK' to close the window.
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How to Set Up a Network Printer on the MacBook Pro

Turn on the printer and use its LCD screen to select your Wi-Fi network, or connect the printer via Ethernet cable to your router. Consult your user manual if you are unsure of this procedure. If using a Wi-Fi connection, enter your network password using the printer's touch keys. If your printer does not have touch keys, see Section 2.
Open your MacBook Pro and click the Apple icon in the top-left corner of your screen. Select 'Software Update' and wait for Apple to gather any printer updates that came installed on your Mac OS X installation disc. Check Apple Support's Printer and Scanner Software Web page for individual updates. Install any applicable software updates and restart your computer.
Click the Apple icon and select 'System Preferences.' Click the 'Print & Fax' icon and click the '+' button on the left side of the window, under the 'Printers' box. Choose your new printer from the list of options. If your printer does not appear, continue to Section 2.
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