RsyncOSX is a pure Swift based macOS application utilizing the command line tool rsync for synchronizing files. It is rsync which executes the actual synchronize task. RsyncOSX is a GUI only ontop of rsync. RsyncOSX is signed and notarized by Apple. Apple has verified it for not containing malicious code and digitally signed it.

rsync is a file based tool for synchronization of files.

Before commenze use of RsyncOSX

RsyncOSX is compiled for macOS Big Sur and later. See the changelog for updates. RsyncOSX is built as a Universal macOS Binary and runs natively on Apple Silicon and Intel based Mac computers.

RsyncOSX can be installed by homebrew by command brew install --cask rsyncosx or by download the latest version. If installed by homebrew the shasum is automatically verified. If downloaded from GitHub please verify the shasum.

Remote servers, passwordless logins and local disks

RsyncOSX can synchronize your data to either remote servers on Internet and local LAN, or to local attached disks. If you only want to synchronize data to a local attached disk, connect the disk and just add the source and destination and you are ready for your first task.

If you want to synchronize data to remote servers there are some more setup to do. If you already have enabled passwordless login by ssh you only have to add login id and servername, the source and destination and you are ready. If you have not enabled passwordless login there are some more actions requiered before your first task. See chapter Remote servers below.

First time

The first time RsyncOSX starts it presents a link to important information. There is also info about the latest version of rsync to install.

The error in bottom of the view is only RsyncOSX complaining about not finding the default file for stored tasks. The error disappears as soon as the first task is added.

Aborting a task

Please be aware it is an external task not controlled by RsyncOSX which executes the command line tool rsync. RsyncOSX is monitoring the task for progress and termination. The user can abort a task at any time. Please let the abort to finish and cleanup properly before starting a new task. It might take a few seconds. If not the apps might become unresponsive.

One of many advantages of utilizing rsync is that it can restart and continue the synchronize task from where it was aborted.

Ready to start using RsyncOSX

New tasks, verify and synchronize data

After adding a task, a double click on the new task will execute a simulated run or what is called a dryrun. Verify the output from rsync by opening the log, top left icon in sidebar of RsyncOSX, either ahead or after the simulated run.

After adding a task you are ready to execute a synchronize data task.

For more experienced users of rsync, select the new task and press the Command button. Copy and paste the Synchronize string into a terminal view for verification of added task. The rsync command includes the dryrun parameter as default within this view.

Always verify, by a dryrun, the result of a new task before executing it.

Add parameters to rsync

Rsync has a ton of parameters. In user selected parameters you can add your own additional parameters to rsync. There is also a set of default rsync parameters.

Remote servers and passwordless logins

There are two ways to setup passwordless logins to a remote server. RsyncOSX supports both. It is strongly advised to use ssh and ssh-keys because the traffic is encrypted and it is considered more secure.

Encrypted protocol by ssh and ssh-keys

Using ssh-keys is in general considered more safe than standard password solutions (single factor authentication). Ssh-keys are based upon public-key cryptography.

Rsync transfer data between client and server by tunneling transfer of data in an encrypted ssh tunnel.

Not encrypted protocol by rsync daemon

There is also possible to setup RsyncOSX utilizing a rsync daemon setup for synchronizing files to remote servers.

Rsync is reading a local file with password information when connecting to the server side rsync daemon. The transfer of data between client and server is not encrypted.

Snapshots is not possible with rsync daemon setup.


Snapshot is an effective method for saving previous versions of data and deleted files in case of a restore.

Schedule tasks

By default the schedules part is not enabled, enable scheduling of tasks in userconfig.

Restore of files

Sometimes you need to restore files.

User configuration

There are a few user selected options.

RsyncOSX config files

Where does RsyncOSX stores the config files?

Compile and how is the apps built

And there is some info about how to compile RsyncOSX and some overview of how the apps are built.