Optimize Disks in macOS 1.3

Does macOS require defragmentation?

macOS file systems manage data efficiently, especially with solid-state drives (SSDs), so defragmentation is unnecessary.

What happens when a drive gets to about 80% capacity?

It becomes less efficient, so it's a good time to delete unneeded files.

How can you view the size of files or folders in macOS?

Right-click the file or folder and select "Get Info."

Where is the Users folder located to examine space per user?

Go to "Go > Computer" and navigate to the system drive, then open the Users folder.

What tool gives a high-level overview of disk usage on macOS?

Click the Apple menu > About This Mac > Storage tab > Manage.

What can you do from the Storage tab's Manage screen?

Delete apps, find large files, and manage storage space by category.

What is Disk Utility used for in macOS?

It's used to verify and repair system drives using the First Aid tool.

Why is it better to run First Aid in recovery mode?

Because some files can't be repaired while in use by the running OS.

What does First Aid do?

It checks and repairs the file system and ensures file permissions are correct.

What is fsck used for on macOS?

To verify and repair the file system using the command line in single-user mode.

How do you run fsck on macOS?

Boot into single-user mode and type: fsck -fy, then press Enter.

What does the -fy flag mean in fsck -fy?

It forces the check and automatically fixes any found errors.

What indicates a successful fsck run?

The message “The file system appears to be OK.”