How to Find the Link Speed of a Mac

Open a new Finder window by clicking on the icon in the dock.
Navigate to the 'Utilities' folder, which can be found in the 'Applications' portion of the Mac hard drive.
Double-click on the 'Network Utility' icon to open the networking program.
Click on the 'Info' tab at the top of the application window.
From the 'Network Interface' drop-down menu, select the network adapter whose speed you wish to look up. The speed of the connection will then appear below.
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How to Connect a Samsung Flat Screen HDTV LCD to a MacBook

Power down your MacBook and change your Samsung's input to either the VGA input or to the HDMI input. This will be dependent on the cable connection you decided to use or that your MacBook allows.
Connect the Mini DVI or Displayport end of the connection cable to your MacBook. Connect one end of the VGA or HDMI cable to the female portion of the cable connected to your Mac and the other end to either the VGA port of your Samsung or an available HDMI port.
Power on your MacBook. It will automatically detect that the Samsung is connected and change your settings accordingly.
Edit your Display preferences via the System Preferences menu. Choose the settings that best suit your needs.
Connect audio by connecting the 3.5mm audio end to your MacBook the red and white RCA cables to your television audio inputs.
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How to Remove the Casing From a Mac (9 Steps)

Locate the lever. On the Mac Pro, there is a lever that needs to be positioned correctly in order to remove the case. The lever is rectangular in shape, positioned vertically, and sits flush with the face of the back panel.
Flip the lever. Apply pressure on the top portion of the lever with your thumb. This will cause the bottom portion of the lever to pop outward from the case. Pull out on the bottom portion until you feel a light snap. This is a sign that the locking mechanism has been released. The lever should stay in the outward position that it is currently in.
Fold down the side panel. The removable side panel is located on the same side of the Mac Pro as the lever. You may have to lift the panel up slightly and pull outward to release it from the rest of the case. The side panel should now be completely free and positioned where you can easily lift it away from the rest of the case.
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How to Force Close Mail on a MacBook (5 Steps)

Click outside of the Mail portion of the screen, somewhere on the desktop, to open Finder. Finder is always running under your other programs, so any problem with Mail won't prevent you from using Finder.
Click on the Apple logo at the top of the screen.
Select 'Force Quit' from the drop-down menu.
Highlight Mail in the pop-up window. If Mail is red and marked 'not responding' you likely have a problem. If the text is black and not otherwise marked, you may want to wait a minute to see if the problem fixes itself.
Click on the 'Force Quit' button to close Mail. You may re-open Mail after the program is forced closed.
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