"More Info" always "Fetching..." when I "Get Info" from a file
The problem was that I had Spotlight disabled. I disabled it because performance. I really never use it.
Would be great if Finder could get that metadata on the fly if it can't find them indexed.
To active Spotlight again:
sudo launchctl load -w /System/Library/LaunchDaemons/com.apple.metadata.mds.plist