20. Manage and Troubleshoot Apps

Question 1

1. Why would you want to open an app in 32-bit mode?

Answer 1

1. Using the Finder Info window, you can force an app to open in 32-bit mode. This step is necessary for a 64-bit app to support older 32-bit plug-ins or app resources.

Question 2

2. What functionality do app extensions add in macOS High Sierra?

Answer 2

2. App extensions allow apps from different developers to interact with each other as if they were built into another app.

Question 3

3. How do you install new app extensions? After they’re installed, how do you manage app extension visibility?

Answer 3

3. App extensions are installed automatically because they’re bundled in the app that provides the extension. You can enable or disable installed app extensions from the Extensions preferences.

Question 4

4. How can you identify the apps that are installed on your Mac?

Answer 4

4. You can use System Information to scan the appropriate app locations and return a list of installed apps.

Question 5

5. In macOS High Sierra, what app do you use to examine open apps?

Answer 5

5. Use Activity Monitor to monitor open processes and apps.

Question 6

6. Which steps should you take when you troubleshoot app issues?

Answer 6

6. General app troubleshooting steps include the following:
   a. Restart the app.
   b. Open another known working document.
   c. Try another app.
   d. Try another user account.
   e. Check diagnostic reports and log files.
   f. Delete cache files.
   g. Replace preference files.
   h. Replace app resources

Question 7

7. Which three ways can you forcibly quit an app from the graphical interface?

Answer 7

7. These are the three ways to forcibly quit an app from the graphical interface:
   a. From the Force Quit Applications dialog
   b. From the Dock
   c. From the Activity Monitor app

Question 8

8. What does the diagnostic reporting feature do?

Answer 8

8. The diagnostic reporting feature automatically creates a diagnostic report log any time an app crashes or hangs. You can view the diagnostic report immediately. It’s reported to Apple through the Internet. You can also view it later in the /Applications/Utilities/Console app.

Question 9

9. Where are app preferences stored?

Answer 9

9. Application preferences are almost always stored in a user’s Library folder in the ~/Library/Preferences folder. Newer sandboxed apps must always store their preferences in a ~/Library/Containers/Bundle ID/ Data/Library/Preferences folder, where Bundle ID is the unique bundle identifier for the app.

Question 10

10. Which file format is often used for preference files? How can you view the content of this file type?

Answer 10

10. Most app preferences are property lists, which are XML files that have the .plist filename extension. You can view the content of these files using Quick Look and edit them using the Xcode development app, which you can get from the App Store.