Macos – Why is the Terminal.app ‘open’ command slower than opening a file via the Finder

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Sometimes when I use open in Terminal.app to open a file, the application spends ~45 seconds bouncing in the Dock, while the same file opens instantly when double-clicked from the finder.

Why does this happen? Is there any way to make open consistently fast?

Best Answer

I have previously experienced issues with quarantined files that were downloaded from the web and have the com.apple.quarantine extended attribute set.

To see if this is the case for your file, ls -l@ filename.ext in Terminal.

To remove the extended attribute, run xattr -d com.apple.quarantine filename.ext

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