---
id: "INC-circleci-wcsh4hxwkrh7"
kind: "incident"
aliases: []
title: "CircleCI: Mac jobs failing to start"
severity: "medium"
cvss: null
epss: null
exploited: false
status: "resolved"
category: "vendor"
products: [{"name": "CircleCI", "fixed": [], "affected": "", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["ci", "circleci", "incident", "macos", "security", "vendor"]
not_affected_if: ["linux-only-jobs"]
published_at: "2026-06-01T01:04:39+00:00"
first_seen_at: "2026-10-23T19:12:22+00:00"
updated_at: "2026-10-25T05:33:22+00:00"
sources: [{"source": "statuspage", "url": "https://stspg.io/n3brb41nn16r", "first_seen_at": "2026-10-23T19:12:22+00:00"}]
---

# CircleCI: Mac jobs failing to start

CircleCI reported that Mac build jobs were failing to start because of a DDoS attack on its infrastructure provider. The provider has since mitigated the attack and CircleCI reports all Mac jobs are running successfully again.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:CircleCI affected ? fixed ?

## How to check

- unknown

## Fix

- unknown

## Timeline

- 2026-10-23T19:12:22+00:00 statuspage https://stspg.io/n3brb41nn16r

## From the sources

All Mac jobs are running successfully.

Our infrastructure provider has confirmed that the DDoS attack has been mitigated and that services have been restored.

Thank you for your patience during this incident.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_