ACMT macOS Troubleshooting

Question 1

A customer's Mac gets stuck on the gray loading bar during startup. Which startup mode should the technician try first?

Accepted Answer

Safe Mode

Answer

Target Disk Mode

Answer

Recovery Mode

Answer

Verbose Mode

Question 2

Which command in macOS Terminal is used to repair disk permissions on an HFS+ volume in Recovery Mode?

Accepted Answer

fsck -fy /dev/disk0

Answer

diskutil repairDisk /

Answer

diskutil repairPermissions /

Answer

chmod -R 755 /

Question 3

What does the 'Prohibitory Symbol' (circle with a slash) at startup indicate on a Mac?

Accepted Answer

macOS cannot find a valid, compatible system folder to boot from

Answer

A hardware memory failure

Answer

The user's account is locked

Answer

SSD has failed completely

Question 4

How does a technician boot a Mac to macOS Recovery on an Apple Silicon Mac?

Accepted Answer

Hold the power button until 'Loading startup options' appears

Answer

Hold Command + R at startup

Answer

Hold Option + D at startup

Answer

Hold Shift at startup

Question 5

A customer reports that their Mac keeps crashing with a kernel panic. Where should the technician look for clues about the cause?

Accepted Answer

Console app > Crash Reports / System Diagnostics

Answer

System Information > Software

Answer

Finder > Applications

Answer

Disk Utility > First Aid

Question 6

Which macOS feature must be disabled before a technician can reinstall macOS on an Apple Silicon Mac that is being sent to Apple depot repair?

Accepted Answer

Activation Lock

Answer

FileVault

Answer

Screen Time

Answer

Gatekeeper