MacBook Finder Error Code -8058 — Cannot Copy Files Fix

What it means

MacBook error -8058 is a macOS Finder 'unexpected error' that appears on copy and paste operations.
The Finder's exact dialog reads: 'The operation can't be completed because an unexpected error occurred. (Error code -8058)'
The most common root cause is a corrupted Finder preferences file (com.apple.finder.plist).
When that file gets damaged, the Finder makes copies that hit unexpected states and aborts them.

Affected Models

Every MacBook running macOS
Common after a forced shutdown that left the Finder mid-write
Common after a macOS upgrade that left old preference files behind
Common when copying many files at once and the Finder is already misbehaving
Affects every recent macOS — Sequoia, Sonoma, Ventura, Monterey, and earlier

Common Causes

Corrupted com.apple.finder.plist preferences file
Damaged or stale Finder cache after an interrupted operation
Source folder contains a file with attributes the destination doesn't understand
Free space on the destination drive is genuinely insufficient for the copy
Filesystem index out of sync — First Aid would catch it

How to Fix It

Restart the Finder.

Hold Option and right-click the Finder icon in the Dock.
Choose Relaunch.
This is a non-destructive first step that often clears a soft Finder glitch without touching any preferences.
Delete the Finder preferences file.

Open Terminal and run: rm ~/Library/Preferences/com.apple.finder.plist
Then relaunch the Finder: killall Finder
macOS recreates com.apple.finder.plist from defaults on the next Finder start.
You'll lose any custom Finder window arrangements, but functionality returns to normal.
Check destination free space.

Open About This Mac > Storage to confirm the destination has plenty of free space.
If you're copying to an external drive, right-click the drive in Finder > Get Info to see free space.
A drive that's 95%+ full triggers -8058 even on small copies.
Try the copy in smaller batches.

Instead of copying a 50GB folder all at once, select half the contents and copy them; then copy the other half.
Large multi-file copies hit -8058 more often than small ones because there are more chances for a single problematic file to abort the whole batch.
Run First Aid on both drives.

Open Disk Utility (Applications > Utilities) and run First Aid on the source drive and the destination drive in turn.
Repair anything First Aid reports.
If First Aid is clean and -8058 still happens after a preferences reset, try copying via Terminal cp instead of Finder.

When to Call a Professional

Error -8058 is a Finder-side software issue.
It almost never indicates a hardware problem.
Deleting the Finder preferences plist and relaunching the Finder fixes the majority of -8058 cases.
If it returns after that, run First Aid on both the source and destination drives.

Frequently Asked Questions

Will deleting com.apple.finder.plist lose my files?

No.
The preferences plist only stores Finder settings — window sizes, sidebar items, view options, and similar UI state.
It does not store any of your actual files or folders.
After deletion, the Finder rebuilds the plist from defaults on its next launch.
You'll see Finder windows return to their default appearance, and any custom sidebar shortcuts will need to be re-added — but every file on your Mac stays exactly where it was.