This confirms VRAM failure on either GPU A or GPU B. Since the GPUs in the 2013 Mac Pro are mounted on proprietary daughterboards, this code means you will need to replace or re-ball that specific graphics card module.
Format the external drive using the map. Split the drive space into two distinct partitions .
Verifies that all thermal, voltage, and current sensors are reporting accurate data. Component Tests: Checks the CPU, RAM, and fan integrity. Quick Scan: Offers a fast summary of system health. 2. ASD (OS) - Operating System Mode
Note: While sometimes associated with discussions around the 2013 "Trash Can" Mac Pro, ASD 3S159 is officially referenced specifically for the Mid-2013 MacBook Air series in many technical documents. How to Run ASD 3S159 asd 3s159
Connect the prepared USB diagnostic drive directly to one of the Mac Pro's rear USB ports.
Open Disk Utility , select your USB drive, and click Erase . Format it as Mac OS Extended (Journaled) with a GUID Partition Map .
To fully appreciate the role of ASD 3S159, it helps to understand the machine it was designed for. The Mac Pro released in late 2013 was a dramatic departure from the standard, tower-like desktop workstation. Apple packed powerful components into a small, cylindrical chassis built around a central thermal core that pulled air in from the bottom and expelled it from the top. This confirms VRAM failure on either GPU A or GPU B
A full Mac OS X environment that allows for more complex diagnostics, including GPU and stress testing. Key Applications of ASD 3S159 on Late 2013 Mac Pro
Any deviation suggests a failed module.
is therefore best understood as a snapshot of Apple's service history. It serves as a specific, official diagnostic tool that was indispensable for repairing the iconic "trash can" Mac Pro (Late 2013). While this software version is now primarily of historical interest to collectors, repair professionals, and vintage Mac enthusiasts, it played a crucial role in maintaining these sophisticated workstations during their active service life. Split the drive space into two distinct partitions
What the Mac Pro is showing (e.g., kernel panics, fan spinning at max, failing to boot)
ASD 3S159 Image ├── ASD (EFI Mode) --> Minimal interactive shell, tests raw hardware channels └── ASD (OS Mode) --> Modified macOS environment, handles complex GPU/VRAM workloads 1. ASD (EFI Mode)
Working with ASD involves significant caveats:
: Define Autism Spectrum Disorder (ASD) as a neurodevelopmental condition affecting communication and social interaction.