SyncMirror: Local folder mirroring for Mac. No cloud, no account.

SyncMirror keeps exact copies of your folders across drives and volumes. Pick a source, add mirrors, hit Sync. Preview before every run, timestamped snapshots, and a hard stop on mass deletions. Everything stays on your Mac. $3.99 once.

Hi Product Hunt! I kept two copies of my work, one on the MacBook and one on an external SSD, and I could never remember which side was newer. Every few months something drifted: a file existed only on the SSD, another only on the laptop, and I'd spend an hour diffing folders in Finder. Cloud sync felt like overkill for folders that never need to leave my desk, and rsync works but I kept fumbling flags and forgetting my own shell scripts. I wanted one button: this folder is the truth, make the copies match it. So I built SyncMirror. One source folder, any number of mirrors, one Sync button. The part I care about most is the safety rails, because sync tools are scary when they go wrong: a preview before every run showing exactly what gets added, updated and deleted, a hard stop on anything that would wipe more than half your files, and timestamped snapshots that warn you when the last one is getting stale. No cloud, no account, no analytics. Sandboxed, it only touches folders you pick. macOS 14 and up, Apple Silicon, $3.99 one time. If you manage backup drives by hand, I'd love to hear how you keep them honest. And if you try SyncMirror, tell me what's missing, I read everything.

honestly love how simple this looks, the hard stop on mass deletions is a nice touch. one thing that would help me though, a quick way to set up automatic syncing on a schedule, like every hour or daily, so i dont have to hit the button manually for files that change often. would also be great to get a small notification when a sync completes.