DCSD in an Apple internal Mac application. When properly configured, the application serves as a diagnostic platform for Foxconn workers. The tool allows multiple devices to connect at once. The tool can boot devices into Inferno with a custom ramdisk that is personalized to the device. Inferno runs stress tests on the device and the results are stored in the DIAGS block. DCSD reports results to a centralized server using a library called libinstantpudding.dylib. All production iPhones are to be run through DCSD for quality assurance. The DCSD app is also capable of installing demo bundles (via mobile backup restoration) for use in retail stores.
Note: Leaked versions don't contain libinstantpudding.dylib nor the necessary signed plist files, so the application forces the user quit.
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