01 / Two-way folder synchronization on Mac
Keep the changes made in both places
The tutorial compares a family documents folder with its copy on an external drive. The holiday plan is newer on the Mac; the moving checklist is newer on the drive. A beach photo exists only on the Mac, and the insurance contacts only on the drive.
The first Update both preview sends two files each way. After four operations, the comparison reports No differences found. The tutorial also shows the Undo synchronization control.
02 / Two-way folder synchronization on Mac
Review the plan before copying
Update both brings across files found only on the other side and uses modification dates to choose between changed files. Check the arrows and the proposed operations before applying them. Files whose dates do not establish a newer version are listed for you to decide.
For the first synchronization shown in the tutorial, nothing is deleted. Review each later preview as well; the proposed operations are the source of truth for that run. To copy in one direction, use Sync left to right or Sync right to left instead.
03 / Two-way folder synchronization on Mac
Keep a way back
The preview lets you keep timestamps and permissions. A recovery backup supports Undo synchronization. If the folders have changed since the comparison, rescan before applying a new plan.
This is a comparison and synchronization workflow you run when needed. Your files stay on your computer and connected drive; they are not uploaded.
04 / Two-way folder synchronization on Mac
Folder sync is included with Pro
Copying and synchronizing folders, including Update both, require Pro. The free folder comparison shows the first 100 items of the result, with up to 10 new comparison sessions per local day.