BSidesSF 2026 - Detecting Race Conditions on macOS (Olivia Gallucci)

In this talk, Olivia Gallucci explores the intricacies of detecting race conditions on macOS, focusing on the role of Grand Central Dispatch (GCD) in managing concurrency. She highlights how improperly utilized queues and Quality of Service (QoS) can lead to critical issues such as race conditions, deadlocks, and even sandbox escapes in privileged services. By examining a GSSCred sandbox-escape race, the speaker maps failure modes to effective code review practices and telemetry, enhancing daemon behavioral detection.