RealTimeSync
RealTimeSync is a macOS file monitoring utility from Florian Bauer that watches folders and runs a sync or other command when changes are detected.
What is RealTimeSync?
RealTimeSync is a native macOS utility for monitoring folders and automatically running a command when files or subfolders change. It is published by Florian Bauer as part of the FreeFileSync project and is commonly used to trigger unattended synchronization and backup jobs after changes are detected in selected locations. Instead of repeatedly scanning on a timer, it listens for operating system change notifications and can wait for a short idle period before launching the configured action. Many users pair it with FreeFileSync batch jobs to keep backups, mirrored folders, external drives, or network locations up to date with less manual work. It can also start when a watched folder becomes available again, which is useful for removable drives and other occasionally connected storage. On Mac, it is most relevant for users who want lightweight, event-driven automation for file sync workflows.
Key features
- Monitor selected folders and subfolders for file changes
- Run a command automatically after changes are detected
- Wait for a configurable idle time before starting the action
- Launch FreeFileSync batch jobs for automated sync and backup tasks
- Import existing batch job configurations to build real-time sync setups
- React when a watched directory becomes available again
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Safety overview
Status: Safe
RealTimeSync is legitimate synchronization software and its background folder monitoring is normal for its purpose. It needs access to the folders you choose to watch, and any command you configure can copy, update, or delete files depending on how that command is set up. The main precaution is to review the sync job or command you connect to it before letting it run automatically, especially when mirrored backups or external drives are involved.
Recommendation: Keep RealTimeSync if you use automatic file synchronization or backup jobs. If you no longer rely on real-time monitoring, you can remove it without affecting macOS itself, but any automated sync workflows tied to it will stop running until you set up another method.
Common paths
/Applications/FreeFileSync.app/Applications/FreeFileSync.app/Contents/MacOS/RealTimeSync
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