How to Connect a MacBook to an LCD TV (6 Steps)

Determine what video cable you need for your MacBook. Older plastic MacBooks require a mini DVI to HDMI adapter and aluminum MacBooks require a mini display port to HDMI adapter. Also, 2009 plastic MacBooks use the mini display port to HDMI cable.
Plug one end of the video adapter into the video output jack of your MacBook. The video output port is on the left hand side of your MacBook.
Insert one end of the HDMI cable into the opposite end of the video adapter.
Connect the opposite end of the HDMI cable into the HDMI input jack of your LCD TV. This is usually located on one of the sides or the back of most LCD TVs.
Change the video input source on your TV to the input that your computer is plugged into. Press the 'Source' or 'Input' button on your remote control to change the video input source.
Optimize display settings on your MacBook. Click the 'Apple' menu followed by 'System Preferences.' Click 'Displays' under the 'Hardware' menu. Click the 'Detect Displays' and the MacBook automatically detects the LCD TV and optimizes the display settings.
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How to Connect Two Macbooks With a USB Cable (5 Steps)

Stand the MacBook Air on a table. Open the MacBook Air’s lid to reveal the LCD screen. Rotate the MacBook Air so that the LCD screen is facing you.
Pull the port access door on the right side of the MacBook Air down with your fingers. Insert the USB cable from the USB-to-Ethernet adapter into the USB slot that is closest to you inside of the port access door.
Stand the MacBook on the table to the left of the MacBook Air.
Plug one end of the Ethernet cable into the Ethernet port on the USB-to-Ethernet adapter that is connected to the MacBook Air.
Plug the other end of the Ethernet cable into the Ethernet port on the side of the MacBook.
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