Yep. Same here. I even reinstalled MacOS from ground. One week later, the same issues... After rebuilding the spotlight index it seems to works for some time... but sometimes only minutes. At first it doesnt find files in Dropbox, then no programs, then after a while even Finder doesnt find files I can see in front of me and that are in the same folder I´m searching. I tried... this: sudo mdutil -E / this: sudo mdutil -ai on mdutil -Ea this: sudo fs_usage -f filesys mds mdworker mdworker32 | grep open and this (deleting the index first): sudo launchctl unload -w /System/Library/LaunchDaemons/com.apple.metadata.mds.plist cd / sudo rm -rf .Spotlight-V100 sudo launchctl load -w /System/Library/LaunchDaemons/com.apple.metadata.mds.plist