Apple Service Diagnostics 3S156 | Mac Os X | 2.76 GB
Apple Service Diagnostics (ASD) is only distributed to Apple Service Providers. The Apple Service Diagnostics application is designed to run both EFI and Mac OS X tests from an internal cd- or dvd-drive or an external USB hard drive ( version 3s123 or above ). Apple Service Diagnostics (EFI) runs low-level tests of the hardware directly and does not require Mac OS X, while Apple Service Diagnostics (OS) uses Mac OS X to run tests.