How to Stop Computers From Sharing My Mac Folders

Click the 'Finder' icon located on your dock or click the 'Apple' icon at the top of your screen, followed by selecting 'System Preferences' from the drop-down menu. Click the 'Sharing' icon located under the 'Internet & Network' section. You can also access System Preferences by holding down 'Fn' and 'Control,' followed by tapping the 'F2' key once. Press the down arrow until you highlight System Preferences, and tap the 'Return' key once.
Uncheck the box next to File Sharing, located on the left side of the dialog box. You can also remove the shared folders by clicking the 'Subtract' button under the 'Shared Folders' section. When finished, click the left arrow in the upper left hand corner of the dialog box or click the red button.
Install and turn on your firewall application to prevent other users from attempting to access your computer. Firewall protection is available online as trial software or you can purchase it at computer retail stores. Most downloadable firewall protection is shareware, which means you'll need to purchase the program in order to access all of its features and continue using it without disruption. Leave your firewall on when using the Internet, as being on a wireless network with other users can leave your computer vulnerable to hackers.
Click the 'Finder' icon on your dock, followed by highlighting the folder you currently share by clicking the folder once. Hold and release the 'Command' and 'i' keys to access the 'Get Info' section. Uncheck the box next to 'Share Folder' and click the red button in the upper left hand corner of the dialog box.
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How to Set Up a Blank Page for Letter Writing on a Mac Computer

Go to the Applications folder and double-click the 'TextEdit' icon. TextEdit will open with a new, blank document.
Type the return address at the top of the document. Put the name on one line; the street address on the next; and the city, state and zip code on the third. Hit the 'Return' key twice.
Enter the date and hit the 'Return' key twice.
Type the address of the letter. Put the name on the first line; the street address on the next; and the city, state and zip code on the third. Hit the 'Return' key twice.
Enter a salutation for the letter. Hit the 'Return' key twice.
Add the body of the letter, leaving a space between any paragraphs. Hit the 'Return' key twice after the last paragraph.
Insert a complimentary close, such as Sincerely or Best regards, and hit the 'Return' key three times. The extra space gives you room to sign the letter once you print it.
Type your name to finish off the letter.
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How Do I Create Different Headers in Word Mac?

Click on the 'View' option from the top toolbar menu and then click on the 'Header and Footer' option. Headers and footers will now be available within your document.
Click on the 'Close' button to return to your document. Click on the bottom of the page where you want to insert a section break in order to separate headers.
Click on the 'Insert' option and then scroll over the 'Break' option. Click on the type of section break you want to insert.
Change your section break at any time by clicking on the 'Format' option and then the 'Document' option. Click on the 'Layout' tab and then choose the type of break you want from the 'Section start' pop-up.
Click on the 'View' option and then click on the 'Header and Footer' option again to bring up the 'Formatting' menu for headers and footers. Click on the 'Switch Between Header and Footer' icon to go to either the header or footer in the document.
Type within the separate headers on each page to create your different headers. Continue to create more page breaks to make additional unique headers.
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How to Reset MacBook Firmware

Power on the MacBook and wait for a warning message that reads 'To continue booting, type 'mac-boot' and press return' to appear on the screen. The firmware on your MacBook must only be reset in the event that this message appears.
Enter 'reset-nvram' in the prompt following the warning message. This resets the non-volatile memory on the computer. This type of memory does not lose information when the computer is reset.
Press the 'Return' key.
Type 'reset-all' at the next command line prompt, and press 'Return' to reset the firmware on your MacBook. This also forces the computer to restart.
Wait for the MacBook to reboot. By the time the laptop restarts and boots into Mac OS X, the firmware is successfully reset.
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How to Change a Folders Name on a Mac

Highlight the desired folder by clicking on it in the Finder window once.
Open the editing feature for the folder title by pressing the 'Return' or 'Enter' key. Type the new name in the text box. Close the text box by clicking anywhere on the screen.
Open the editing feature for the folder title by clicking on the folder title. It is important to delay this second click so that it occurs about a second after the first click that you used to select the folder. Type the new name in the text box. Close the text box by clicking anywhere on the screen.
Change the name of the folder by going into the 'Get Info' feature. Pressing Command-I or selecting 'Get Info' from the 'File' menu allows you to access this feature. Go to 'Name and Extension' and press the triangle next to it to expand the option. Type the desired name in the text box. Close 'Get Info' by clicking on the red circle at the upper left corner of the window.
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How to Open the Command Prompt on Mac Computers

Click on your 'Applications' folder inside of the hard drive.
Open the 'Utilities' folder and double-click on 'Terminal'.
Type a command at the command prompt and click 'Return' on the keyboard to use the command line.
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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 Customize a MacBook Pro Theme

Select 'System Preferences' from the doc. The System Preferences icon displays as a box filled with silver gears.
Choose 'Appearance' under the 'Personal' pane. Select a general color scheme and text highlight color from the drop-down menus that appear. Click 'Show All' to return to System Preferences.
Click 'Desktop & Screen Saver.' Choose 'iPhoto' to browse the iPhoto Library for desktop background images, or 'Folder' to search through folders on the computer. Click the name of any image to set it as the desktop background.
Choose 'Screen Saver.' Click the name of any available Apple screen saver to preview it and select it as yours, or click 'iPhoto' to designate an iPhoto directory as the source for a slideshow of images across the screen. Click 'Show All.'
Select 'Docks.' Slide the bar to the left or right to decrease or increase the size of the dock and applications that appear in it. Enable and adjust the level of 'Magnification' to make icons appear larger when you hover your mouse over them. Select a position for the dock -- left, right or center -- then exit out of System Preferences.
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How to Add Yourself to Sudoers Files in the Mac OS X on a MacBook

Press 'Command-F' on the keyboard, type 'terminal' in the Search field and click the 'Terminal' appication to open it.
Type 'sudo –s' into the blank command prompt window and hit the 'Return' key. You are prompted to log in with your computer's root password.
Enter the administrator password that you chose when you originally set up your MacBook, then press 'Return' to log in as the root user.
Type 'sudo visudo' in the command prompt window and press 'Return.'
Place your text cursor at the end of the line that contains the text 'root ALL=(ALL) ALL.'
Hit 'Return' to add a new line and then type 'username ALL=(ALL) ALL,' replacing 'username' with the short name of the account you want to add to the sudoers list.
Select 'Save' from the File menu to confirm the changes.
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