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→Installing Xcode and the iOS 4 SDK
The download is over 3.5GB in size and will take a number of hours to complete depending on the speed of your internet connection. The package takes the form of a disk image (.dmg) file. Once the download has completed, a new window will open as follows displaying the contents of the .dmg file:
[[Image:ios4_and_xcode_dmg.jpg|The contents of the Xcode and iOS SDK dmg file]]
The default selections on this screen are adequate for most requirements so unless you have specific needs there is no necessity to alter these selections. Continue to the next screen, review the information and click ''Install'' to begin the installation. Note that you may first be prompted to enter your password as a security precaution. The duration of the installation process will vary depending on the speed and current load on the computer, but typically completes in 15 - 30 minutes.
== Starting Xcode ==
