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I'm trying to use unison (the GUI) to synchronize two folders; unfortunately, one of them is a Windows drive mountpoint with properties set to 0777 - and unison shows that as a difference which requires synchronization.

How can I make unison (specifically, the GUI) ignore these property differences and only look at the rest of the criteria (dates, sizes etc.?)

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  • According to unison documentations - incompatible permissions between different systems aren't synced. The same applied to unix's user/groups, but since it is mapped drive you should set the same permissions in both locations or use unison instance on windows itself. Unison actually officially abounded project. I suggest you to try "syncthing", it is single file without any dependencies and compiled practically for all well know operation systems.
    – Alex
    Commented Jan 11, 2017 at 23:01
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    According to this page cis.upenn.edu/~bcpierce/unison/status.html Unison is still maintained and new versions are released... they only say that "Unison is no longer under active development as a research project."
    – lorenzo-bettini
    Commented Feb 27, 2020 at 12:35

1 Answer 1

Reset to default
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As indicated in the Preferences section of the Unison User Manual and Reference Guide, you can set:

perms=0
dontchmod=true

in your preferences file (.prf).

On a computer running OS X, you can find these .prf-files in the directory /Users/username/Library/Application Support/Unison/

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    perms = 0 means: do not synchronize permissions.
    – user674669
    Commented Nov 10, 2019 at 5:26

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