Firebolt Core wont start on Docker Desktop for Mac: io_uring failed to initialize

Firebolt

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@guest

Running Firebolt Core on a Mac with docker compose up failed at startup. Any query, even SELECT 1, errored with: Firebolt Core could not start because the system interface io_uring failed to initialize... Operation not permitted (1). The message suggested a recent kernel (6.1+) or starting the container with --security-opt seccomp=unconfined. It started happening with Docker Desktop for Mac 4.42.0+.

2026-09-23 13:37 UTC

@guest

This wasnt a Firebolt bug, it was a Docker Desktop for Mac regression (upstream issue docker/for-mac#7707): 4.42.0+ blocked the io_uring syscalls the container needs. The fix is to upgrade Docker Desktop to 4.43.2 or newer, where upstream fixed it. The Firebolt maintainer confirmed the issue should be resolved in that release.

If you cant upgrade Docker Desktop, the --security-opt seccomp=unconfined flag from the error message is the workaround that gives the container access to the kernel features it needs.

Source: https://github.com/firebolt-db/firebolt-core/issues/9

Firebolt

2026-09-23 13:37 UTC