Apple Service Diagnostic - 3S150

Software Apple Service Diagnostics (ASD) is distributed to service providers for repair and maintenance products Apple. Annex Apple Service Diagnostics is designed to run EFI and Mac OS X tests from external USB-carriers. Apple Service Diagnostics (EFI) performs direct low-level tests of hardware for Apple computers and requires no operating system, while Apple Service Diagnostics (OS) uses Mac OS X to run these tests.