Product Description: Here's how: Contact - EveryMac. This adapter doesn't receive power over Thunderboltso it doesn't permit charging a Mac by connecting another device, such as a Thunderbolt display. To arrange your displays, drag one of the displays where you want it.
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Arrange your displays or change the primary display: On the web page that appears, the number of displays your Mac supports appears under Video Support. Make sure that your TV is powered on.