Apple Service Diagnostics - 3s155 ~upd~ ❲Cross-Platform❳

This version loads a stripped-down version of macOS to perform high-level tests. It allows for more complex benchmarks, including GPU stress tests and CPU vector acceleration (Altivec) routines that require a running OS environment.

Apple Service Diagnostics (ASD) is a suite of diagnostic tools used by Apple Authorized Service Providers (AASPs) and Apple retail stores to troubleshoot hardware issues. Unlike standard consumer-facing tools like Apple Diagnostics (accessed by holding 'D' during startup), ASD is a comprehensive, bootable environment that performs granular testing of the Mac’s subsystems. Apple Service Diagnostics - 3S155

Use a 10x loupe or a microscope. Look inside the USB-C ports on the affected side of the MacBook. This version loads a stripped-down version of macOS