I've got a MacBook Pro on 10.7.5 and I'd like to transfer photos from my computer to my iPhone5. What's The easiest way to do so?
Use iTunes to transfer your photos to your iPhone. Make sure you have the latest version of iTunes if you are running iOS 6 on your iPhone 5. In the device’s Photo pane, you can sync photos and videos from a folder on your computer.
You can also use the iCloud Photo Stream to upload photos to iCloud, then they will show up in your photo stream on the iPhone. Just make sure you uncheck "Automatic Upload" or all new pictures on your Mac will be uploaded.