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Apple 9L0-066

9L0-066

Exam Code: 9L0-066

Exam Name: OS X Yosemite Troubleshooting Exam

Updated: Jul 21, 2026

Q & A: 65 Questions and Answers

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Apple 9L0-066 Exam Syllabus Topics:

SectionObjectives
System Installation and Configuration- System requirements and compatibility troubleshooting
- Recovery and reinstall options
- OS X Yosemite installation and upgrade processes
File Systems and Data Management- Disk Utility and storage troubleshooting
- File permissions and access control
Applications and System Performance- Application crashes and compatibility issues
- Performance optimization and Activity Monitor usage
System Recovery and Maintenance- Safe Mode and recovery tools
- Time Machine backup and restore
User Accounts and Authentication- Login issues and keychain troubleshooting
- User account creation and management
Networking and Connectivity- Network configuration and DNS issues
- Wi-Fi and Ethernet troubleshooting
Peripherals and Hardware- Input devices and hardware diagnostics
- Printer and external device troubleshooting
System Security and Privacy- Privacy settings and permissions
- FileVault and system security settings

Apple OS X Yosemite Troubleshooting Sample Questions:

1. John wants more information about backing up his data in OS X.
You inform him of Time Machine and show him how to start process at home. He is concerned that the backup will fail and he will not be able to determine if the process worked. How is John alerted to his initial backup status with Time Machine in OS X Yosemite?

A) Time Machine provides Notifications of any issues that arise during the initial backup and when the first backup is complete.
B) John will have to perform a manual check of his backup in order to confirm that the backup was successful.
C) The computer is unusable while completing the first backup.
D) There is a diagnostic LED on all computers that will flash when the Time Machine backup fails.


2. There is a way to start up your Mac so that it performs certain checks and prevents some software from automatically loading or opening. What is the name of this startup method?

A) Disk Utility
B) Console
C) Safe Mode
D) Restore


3. Randall is using OS X Yosemite v10.10 on a MacBook Air (Late 2010). He would like to AirDrop a 7GB file to a colleague. The colleague is using OS X Mountain Lion v10.8.5 on an iMac (Early 2009). Randall cannot locate the colleague's iMac in AirDrop. Which of the following is preventing this transfer?

A) OS X Yosemite cannot AirDrop with OS X Mountain Lion.
B) AirDrop does not support files larger than 5GB.
C) On the MacBook Air, Randall must first click "Don't see who you're looking for?'
D) The iMac (Early 2009) does not support AirDrop.


4. An iMac starts, but becomes unresponsive after the login screen. How can you easily disable login items to see if they are causing the issue?

A) Hold the Shift key at start up to Safe Boot.
B) Start the iMac to OS X Recovery, open Terminal, and use it to delete all login items.
C) Start the iMac to OS X Recovery and reinstall OS X
D) Hold Command-S to enter single-user mode, then mo


5. Your customer asks, "What version of OS X do I have to have installed on my older Mac so I can download OS X Yosemite from the App Store?" Which of the following is the correct response?

A) "To install OS X Yosemite, you will need to download a version of Mac App Store that will run on any version of OS X."
B) "To update to OS X Yosemite, you need to have Mac OS X Leopard v10.5.2 or later already installed on your Macs."
C) "To download OS X Yosemite from the App Store, you will need to have Mac OS X Snow Leopard v10.6.8 or newer installed."
D) 'To download OS X Yosemite, you will need to have OS X Mountain Lion v10.8 installed and App Store running."


Solutions:

Question # 1
Answer: A
Question # 2
Answer: C
Question # 3
Answer: C
Question # 4
Answer: A
Question # 5
Answer: C

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