Apple Certified Macintosh Technician (ACMT) — Questions and Answers

Question 1: What happens when your iPhone leaves the Wi-Fi network during an iCloud backup?

The backup stops and is archived; it automatically restarts from the beginning when your iPhone reconnects.
The backup stops and you must restart it in iCloud settings when your iPhone reconnects.
The backup continues
The backup pauses until your iPhone reconnects. (Correct answer)

Correct answer: The backup pauses until your iPhone reconnects.

iCloud backups require a continuous Wi-Fi connection; if the iPhone disconnects, the backup pauses and automatically resumes when Wi-Fi is restored. The backup does not continue without Wi-Fi, does not require a manual restart, and is not archived or restarted from the beginning.

Question 2: What does Disk Utility do?

It locates nonresponsive disk processes and forces them to quit.
It collects log messages that are generated from a Mac disk.
It enables you to share disk diagnostics with developers.
It finds and repairs Mac disk errors. (Correct answer)

Correct answer: It finds and repairs Mac disk errors.

Disk Utility can find and repair related to the formatting and directory structure of a Mac disk. Errors can lead to unexpected behavior when using your Mac, and significant errors might even prevent your Mac from starting up completely.

Question 3: What is the purpose of the Apple T2 Security Chip's role in power management on supported Macs?

The T2 chip integrates the SMC functions, handling power management and secure boot alongside encryption (Correct answer)
The T2 chip replaces the battery management system entirely
The T2 chip offloads power management to a separate external module
The T2 chip only manages display power states

Correct answer: The T2 chip integrates the SMC functions, handling power management and secure boot alongside encryption

On Macs with the T2 chip, the SMC is integrated into the T2, which handles power management, thermal control, and secure boot functions all within one secure coprocessor.

Question 4: Which macOS command flushes the local DNS cache to resolve domain name resolution issues?

sudo dscacheutil -flushcache; sudo killall -HUP mDNSResponder (Correct answer)
ipconfig /flushdns
networksetup -flushroutes
ping -flush 8.8.8.8

Correct answer: sudo dscacheutil -flushcache; sudo killall -HUP mDNSResponder

On macOS, flushing the DNS cache requires running 'sudo dscacheutil -flushcache' followed by 'sudo killall -HUP mDNSResponder' to clear and restart the DNS resolver.

Question 5: Which type of screwdriver is most commonly used for internal screws on MacBook logic boards and components?

Hex 2.5mm
Torx T3 or T5 (Correct answer)
Flathead
Phillips #1

Correct answer: Torx T3 or T5

Internal MacBook screws securing components to the logic board commonly use Torx T3 or T5 heads, requiring the appropriate Torx driver to avoid stripping.

Question 6: A MacBook's Bluetooth is greyed out and unavailable after a repair. What is the most likely cause?

The Bluetooth antenna or its cable was damaged or disconnected during the repair (Correct answer)
The customer's Apple ID is not signed in
macOS needs to be updated
The SMC needs to be reset

Correct answer: The Bluetooth antenna or its cable was damaged or disconnected during the repair

Bluetooth sharing the same antenna or having a dedicated cable that can be damaged or disconnected during repair is the most common hardware cause of post-repair Bluetooth failure.

Question 7: What does 'Three Beeps at Startup' indicate on an Intel-based Mac?

Corrupt macOS installation
No bootable disk found
RAM failure or incompatibility (Correct answer)
SMC reset required

Correct answer: RAM failure or incompatibility

Three beeps at startup on an Intel Mac indicate a RAM failure, including bad RAM, incompatible RAM, or RAM not seated properly.

Question 8: Which file system format does Apple recommend for the primary macOS startup volume on modern Macs?

ExFAT
APFS (Apple File System) (Correct answer)
NTFS
HFS+

Correct answer: APFS (Apple File System)

APFS is Apple's modern file system, required for SSD-based Macs running macOS High Sierra and later, offering features like snapshots and space sharing.

Question 9: A customer reports that their Mac keeps crashing with a kernel panic. Where should the technician look for clues about the cause?

Console app > Crash Reports / System Diagnostics (Correct answer)
Finder > Applications
System Information > Software
Disk Utility > First Aid

Correct answer: Console app > Crash Reports / System Diagnostics

The Console app's Crash Reports and System Diagnostics sections contain kernel panic logs (panic.ips files) that identify the crashing process or driver.

Question 10: How can a technician verify the MAC address of a Mac's Wi-Fi adapter?

By running 'ping localhost' in Terminal
In System Settings > Wi-Fi > Details > Hardware Address (Correct answer)
In Disk Utility
In Activity Monitor > Network tab

Correct answer: In System Settings > Wi-Fi > Details > Hardware Address

The Wi-Fi hardware (MAC) address is displayed in System Settings > Wi-Fi > Details for the connected network under 'Hardware Address'.

Question 11: How does a technician boot a Mac to macOS Recovery on an Apple Silicon Mac?

Hold Command + R at startup
Hold Shift at startup
Hold Option + D at startup
Hold the power button until 'Loading startup options' appears (Correct answer)

Correct answer: Hold the power button until 'Loading startup options' appears

On Apple Silicon Macs, holding the power button until 'Loading startup options' appears is the correct way to enter recoveryOS.

Question 12: A Mac's Ethernet port shows 'Cable Unplugged' even with a cable connected. What should the technician check?

Reinstall macOS
Replace the logic board immediately
Try a known-good Ethernet cable and test the port with a USB-C Ethernet adapter to isolate the built-in port (Correct answer)
Reset the SMC immediately

Correct answer: Try a known-good Ethernet cable and test the port with a USB-C Ethernet adapter to isolate the built-in port

Testing with a known-good cable and an external USB-C Ethernet adapter isolates whether the problem is the cable, the cable run, or the Mac's built-in Ethernet hardware.

Question 13: Which macOS utility allows a technician to create a bootable macOS installer on a USB drive?

Migration Assistant
Apple Configurator 2
Disk Utility
createinstallmedia command-line tool (Correct answer)

Correct answer: createinstallmedia command-line tool

The 'createinstallmedia' command-line tool, included in the macOS installer app, is used to create a bootable USB installer drive.

Question 14: What does the Apple Repair Extension Program (REP) offer to customers?

Extended return windows for new purchases
Free repairs for specific documented issues even on out-of-warranty devices when Apple has acknowledged a manufacturing defect (Correct answer)
Extended AppleCare+ at a discounted rate
A trade-in credit for damaged devices

Correct answer: Free repairs for specific documented issues even on out-of-warranty devices when Apple has acknowledged a manufacturing defect

A Repair Extension Program extends the service period for specific known manufacturing defects, allowing Apple or AASPs to repair affected units at no charge beyond normal warranty periods.

Question 15: What does the 'Internet Sharing' feature in macOS System Settings allow?

Sharing the Mac's internet connection with other devices via Wi-Fi, Ethernet, or Bluetooth (Correct answer)
Sharing files over the internet
Remotely managing network settings
Accessing another Mac's internet connection

Correct answer: Sharing the Mac's internet connection with other devices via Wi-Fi, Ethernet, or Bluetooth

Internet Sharing turns the Mac into a router, distributing its internet connection to other devices connected via Wi-Fi hotspot, Ethernet, or Bluetooth.

Question 16: A user's Mac is running slowly and Activity Monitor shows high kernel_task CPU usage. What is the most likely cause?

The SSD is full
RAM is faulty
A virus infection
The Mac is throttling the CPU due to thermal or power issues (Correct answer)

Correct answer: The Mac is throttling the CPU due to thermal or power issues

High kernel_task CPU usage is typically macOS's thermal management intentionally reducing CPU performance to protect hardware from overheating.

Question 17: A technician is using a spudger during a MacBook repair. What is the primary purpose of this tool?

Cutting adhesive tape
Prying apart components and routing cables without causing ESD or scratching delicate surfaces (Correct answer)
Measuring component resistance
Tightening small screws

Correct answer: Prying apart components and routing cables without causing ESD or scratching delicate surfaces

A spudger is a non-conductive, non-marring plastic or nylon tool used to pry, route, and lift cables and connectors without scratching surfaces or creating ESD damage.

Question 18: How can a technician force a MacBook Pro with dual GPUs to use only the integrated GPU for diagnostic purposes?

Run Apple Diagnostics
Boot into Safe Mode
Reset the SMC
Navigate to System Settings > Battery and disable 'Automatic graphics switching', or use gfxCardStatus (Correct answer)

Correct answer: Navigate to System Settings > Battery and disable 'Automatic graphics switching', or use gfxCardStatus

Disabling automatic graphics switching forces the Mac to use the integrated GPU, helping isolate whether display issues are caused by the discrete GPU.

Question 19: What error code category in Apple Diagnostics indicates a memory issue?

ADP
VFD
MEM (Correct answer)
NDC

Correct answer: MEM

Apple Diagnostics error codes beginning with 'MEM' indicate that a problem was detected with the Mac's memory (RAM).

Question 20: A previous trusted Mac app asks for access to your keychain. <br> Why would an app ask for access that was previously granted?

The app was recently updated (Correct answer)
Touch ID was recently reset
Gatekeeper couldn't validate the app.
The login password was changed.

Correct answer: The app was recently updated

If an app was recently updated, or if the app has been modified, you must grant access to your keychain again.

Question 21: What does the 'Prohibitory Symbol' (circle with a slash) at startup indicate on a Mac?

SSD has failed completely
The user's account is locked
macOS cannot find a valid, compatible system folder to boot from (Correct answer)
A hardware memory failure

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

The prohibitory symbol means the Mac found a startup disk but cannot use it, usually because macOS is missing, corrupt, or incompatible with the hardware.

Question 22: You're troubleshooting Anthony's managed Mac, and the next step is to start in safe mode. You're asked to authenticate. <br> What should you use to authenticate?

The user-linked Activation Lock bypass code
The recovery OS password set from MDM (Correct answer)
The firmware password
The organization-linked Activation Lock bypass code

Correct answer: The recovery OS password set from MDM

When you start Anthony's managed Mac in safe mode, you authenticate using the recovery OS password set by MDM.

Question 23: What is the typical maximum cycle count for MacBook lithium-ion batteries before Apple considers the battery consumed?

300 cycles
500 cycles
2000 cycles
1000 cycles (Correct answer)

Correct answer: 1000 cycles

Modern MacBook lithium-ion batteries are designed to retain up to 80% of their original capacity after 1000 full charge cycles, which Apple considers the battery's useful lifespan.

Question 24: Why must a technician disconnect the battery before working on a MacBook's logic board?

To prevent the Mac from waking during repair
To allow the RAM to be removed safely
To prevent data loss on the SSD
To eliminate the risk of short circuits and component damage from residual current while handling circuit board components (Correct answer)

Correct answer: To eliminate the risk of short circuits and component damage from residual current while handling circuit board components

Even with the MacBook powered off, the battery provides voltage that can flow through the board; disconnecting it eliminates the risk of short circuits that can destroy components.

Question 25: Which keyboard shortcut detects and configures a newly connected external display on a Mac?

Option + Brightness key
Command + F2
Control + Command + Q
System Settings > Displays > Detect Displays (Correct answer)

Correct answer: System Settings > Displays > Detect Displays

Clicking 'Detect Displays' in System Settings > Displays forces macOS to scan for connected external displays when one is not recognized automatically.

Question 26: What information does the 'About This Mac > System Report' provide that is useful during diagnostics?

AppleCare warranty status only
Network traffic logs
Real-time CPU temperature
Detailed hardware configuration including serial numbers, USB devices, and installed RAM (Correct answer)

Correct answer: Detailed hardware configuration including serial numbers, USB devices, and installed RAM

System Report (via System Information) provides comprehensive hardware details including serial numbers, component specs, connected devices, and installed RAM for diagnostic purposes.

Question 27: A Mac Pro fails to recognize a newly installed RAM DIMM. What should the technician verify first?

The SSD is compatible
Bluetooth is enabled
The DIMM is seated in a validated slot configuration per Apple's guide (Correct answer)
The macOS version supports the RAM

Correct answer: The DIMM is seated in a validated slot configuration per Apple's guide

Mac Pro RAM must be installed in specific slot configurations as documented by Apple; incorrect slot placement results in the DIMM not being recognized.

Question 28: What is the purpose of the 'Erase Mac' option available in macOS Recovery on Apple Silicon Macs?

It removes third-party applications only
It resets NVRAM only
It erases the disk and reinstalls macOS, returning the Mac to factory state (Correct answer)
It only removes user files

Correct answer: It erases the disk and reinstalls macOS, returning the Mac to factory state

'Erase Mac' in recoveryOS on Apple Silicon Macs erases all content and settings and reinstalls macOS, preparing the device for a new owner or for depot repair.

Question 29: A Mac is connected via Ethernet but cannot reach the internet. The network shows 'Self-Assigned IP.' What does this indicate?

The Ethernet cable is too long
The Mac failed to obtain an IP address from the DHCP server, so it assigned itself a 169.254.x.x address (Correct answer)
Wi-Fi is interfering with Ethernet
The Mac's firewall is blocking traffic

Correct answer: The Mac failed to obtain an IP address from the DHCP server, so it assigned itself a 169.254.x.x address

A 169.254.x.x self-assigned IP (APIPA) indicates DHCP failure; the Mac could not reach the DHCP server, so it assigned itself a link-local address that does not route to the internet.

Question 30: 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?

Gatekeeper
FileVault
Screen Time
Activation Lock (Correct answer)

Correct answer: Activation Lock

Activation Lock, tied to the user's Apple ID, must be disabled before sending an Apple Silicon Mac for depot repair to allow Apple to perform system-level operations.

Apple Certified Macintosh Technician (ACMT)

The ACMT certification validates technicians' ability to diagnose, troubleshoot, and repair Apple Mac hardware and macOS software issues, covering hardware components, operating system troubleshooting, networking, and mandatory safety protocols including ESD precautions.

Questions

35 min

Time Limit

73%

To Pass

Checking for saved progress...

Exam Rules

You can skip questions and return to them later
Flag questions for review before submitting
No feedback shown until you submit the entire exam
Unanswered questions count as wrong — answer everything
10 pretest questions are mixed in and don't affect your score
Timer auto-submits when time runs out
Your progress is auto-saved every 30 seconds