iCloud 
Set up My Photo Stream
Your new photos appear automatically on the iOS devices, computers, and Apple TV you set up with My Photo Stream, no matter which iOS device or computer you use to take or import new photos. For system requirements, see the Apple Support article iCloud: System requirements.
On an iOS 7 device
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Go to Settings, tap iCloud, tap Photos, then turn on My Photo Stream.
With My Photo Stream turned on, new photos taken with your iOS device are uploaded to iCloud when your device is connected to the Internet via Wi-Fi. The new photos appear automatically in My Photo Stream on your other devices set up with My Photo Stream, including your Mac and Windows computers and your Apple TV.
On an iOS 6 device
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Go to Settings, tap iCloud, tap Photo Stream, then turn on My Photo Stream.
With My Photo Stream turned on, new photos taken with your iOS device are uploaded to iCloud when your device is connected to the Internet via Wi-Fi. The new photos appear automatically in My Photo Stream on your other devices set up with My Photo Stream, including your Mac and Windows computers and your Apple TV.
On a Mac to work with iPhoto or Aperture
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For instructions, see one of these iPhoto Help or Aperture Help topics:
On Apple TV
Go to Settings > iCloud.
Select Sign In, press the center button on your remote, then follow the onscreen instructions to enter the Apple ID and password you use with iCloud.
Select iCloud Photo Settings, press the center button on your remote, select Turn On My Photo Stream, then press the center button on your remote again.
On a Windows computer
Install the iCloud Control Panel if it isn’t already installed on your computer.
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Open the iCloud Control Panel, then turn on Photos.
My Photo Stream is set up by default. To turn it off, click Options, then turn off My Photo Stream.
To change the iCloud Photos location on your computer, click Options. Click Change to choose a folder, then click OK.
Click Apply.