Apple Hardware & Software Troubleshooting Flashcards

What is the function of Rosetta 2 on Apple Silicon Macs?

Answer: Translates x86_64 Intel apps to run on ARM-based Apple Silicon

Rosetta 2 dynamically translates Intel x86_64 binaries so they can run on Apple Silicon ARM processors without modification.

A MacBook Pro's keyboard has keys that are unresponsive. After a restart doesn't resolve it, what should be tried next on a machine with a T2 chip?

Answer: SMC reset

Resetting the SMC (System Management Controller) resolves many hardware-level issues including keyboard, trackpad, and battery problems.

Which tool in macOS Recovery allows you to reinstall macOS without erasing user data?

Answer: Reinstall macOS option in Recovery

The 'Reinstall macOS' option in Recovery Mode reinstalls the OS while preserving the user's files and data on the startup disk.

What does a three-beep startup tone on older Intel Macs typically indicate?

Answer: RAM failure or incompatibility

Three beeps at startup on Intel Macs is a RAM error code indicating failed memory detection or incompatible RAM modules.

A user's iPhone is stuck in a boot loop. Which recovery mode allows restoring iOS without erasing data if possible?

Answer: Recovery Mode (iTunes/Finder)

Recovery Mode via Finder or iTunes first attempts an update-restore that preserves data; DFU mode performs a deeper wipe and restore.

What is the purpose of the 'Secure Enclave' in Apple devices?

Answer: It stores and processes biometric data (Face ID/Touch ID) in an isolated processor

The Secure Enclave is a dedicated security coprocessor that stores cryptographic keys and biometric data, completely isolated from the main CPU.

When diagnosing a Mac with Apple Diagnostics (Apple Silicon), how do you initiate the test?

Answer: Hold the power button until the startup options screen, then hold Command+D

On Apple Silicon Macs, hold the power button until startup options appear, then hold Command+D to launch Apple Diagnostics.