Unable to sync windows to a Mac via SMB due to uchg (immutable) flags

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Posts: 3
Joined: 16 Mar 2025

beterhans

Description:
When using FreeFileSync on Windows to synchronize files to a macOS-hosted SMB share, Windows file attributes some how mapped by macOS's SMB daemon into the uchg (user immutable) flag.

Once the uchg flag is set on the macOS side, folder become immutable. This causes FreeFileSync to fail on subsequent sync runs when it tries to overwrite or delete those files, resulting in permission/access errors until the flags are manually cleared via:
chflags -R nouchg *


Need help on is there any workaround can be configured on Mac side or windows side?
I don't want to do manual cmd everytime.