I am unable to start Parity, the database migration fails repeatedly. How in Parity on MacOS (1.4.5 already installed) do I eliminate this error so that my Parity will run?

Geth is fine but not running when this occurs.

1 Answer 1


Open a terminal and remove your blockchain.

rm -rf ~/.parity/906a34e69aec8c0d/*

Resync again with --warp, this only takes a few minutes.

parity --warp
  • .parity/906a34e69aec8c0d/v5.3-sec-overlayrecent/db: Directory not empty parity --warp Unknown flag: '--warp' I have v1.4.5
    – b glen
    Dec 3, 2016 at 13:17
  • parity --warp Unknown flag: '--warp'
    – b glen
    Dec 3, 2016 at 13:18
  • What's the output of --version?
    – q9f
    Dec 3, 2016 at 13:20
  • ethcore/ethcore/parity 1.4.5 already installed $ parity --warp Unknown flag: '--warp'
    – b glen
    Dec 3, 2016 at 13:31
  • It somehow seems it is not. Can you check parity --version if its the same binary linked?
    – q9f
    Dec 4, 2016 at 15:34

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