How to Add a Dashboard to the Dock

Click the 'Hard Drive' icon on your desktop.
Click 'Applications' in the 'Hard Drive' window that appears. It may be in the left column or in the set of folders that appears. This depends on how you have your view constructed on your Mac.
Click and hold the Dashboard application icon. Drag it to your Dock. Release your mouse button. The icon appears on the Dock. Click on it to launch your Dashboard. Click on it again to shut down your Dashboard.
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How to Connect a Mac to Apple TV (6 Steps)

Remove the Apple TV device from its packaging, and find the HDMI port cable that came with it. Connect the cable to your Apple TV and to your TV.
Connect the white, red, green and blue audio cables to the Apple TV and your TV. The setup of these cables depends on your television's audio capabilities. Plug the power cord into the Apple TV, and plug it into a power supply.
Turn on your TV, and go to the setup screen for the Apple TV. This will depend on the input channel setup on your TV.
Select a network to connect to in the prompts that appear with your Apple TV remote. Enter the password to get access to the network with the remote. Once the Apple TV is on the network and set up, you will see a main screen with 'Movies,' 'Internet,' 'Computers' and 'Settings' tabs.
Go to your Mac computer, and launch iTunes. Click 'Advanced' and then choose 'Turn On Home Sharing.' Enter your Apple ID and password in the fields, and click the 'Create Home Share' button. Click the 'Done' button.
Go back to your TV, and toggle to the 'Computer' tab. Choose 'Home Sharing,' enter the password with the remote, and click 'Done.' The Apple TV is now connected to the Mac through iTunes.
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