I just updated my Parity client on Mac to v1.5.0, but now get this error:

Client service error: Client(Database("IO error: lock /Users/<path>/.parity/906a34e69aec8c0d/v5.3-sec-overlayrecent/db/LOCK: Resource temporarily unavailable"))

Any ideas how to deal with this?

  • 1
    It's already running.
    – q9f
    Commented Nov 22, 2016 at 14:39

1 Answer 1


It means that the node is already running.

If you used Mac installer it automatically runs Parity as a background service. Just go to http://localhost:8080 to see the UI.

If you prefer to run Parity manually either stop or uninstall the Service:

  • To stop: $ launchctl stop io.parity.ethereum
  • To uninstall: $ sudo /usr/local/libexec/uninstall-parity.sh

Details: https://github.com/ethcore/parity/blob/master/mac/install-readme.txt

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