# Syncthing for macOS

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> [!NOTE]  
> Syncthing v2 is the supported version since 23 february 2026. It needs at least macOS 12. Syncthing v1 is deprecated and will not get any updates or bugfixes. For version compatibility see [README.md#macos-version-support](https://github.com/syncthing/syncthing-macos/blob/v2/README.md#macos-version-support).

# Introduction

`syncthing-macos` project is a [frugal](https://en.wikipedia.org/wiki/Frugality) [native](https://en.wikipedia.org/wiki/Native_(computing)) macOS [Syncthing](https://syncthing.net) tray application bundle. It bundles its own Syncthing instance and wraps Syncthing background process, making it behave more like a native macOS application and less like a command-line utility with a web browser interface.

Features include:

 * Open the [Syncthing WebGUI](https://docs.syncthing.net/intro/gui.html) from the tray in your system preferred browser.
 * Optionally starts on login, so you don't need to set up Syncthing as a service.
 * Tray icon syncthing status indicator.
 * Retina ready icons for the Application bundle and status tray.
 * Automatic updates (using [Sparkle](https://sparkle-project.org) pushed from GitHub Releases).
 * Open shared folders in Finder.
 * Log file written to `~/Library/Application Support/Syncthing/syncthing.log`, use Finder -> Go -> Go to Folder to open it.

# Screenshot

<img alt="screenshot.png" src="https://user-images.githubusercontent.com/1050166/48157165-35970f00-e2cf-11e8-8009-10bfbf7fbce2.png">

# Installation

**NOTICE**: This is the official Syncthing macOS application bundle. Please make sure you have no other [syncthing instances](https://docs.syncthing.net/users/autostart.html#macos)
            or [wrappers running](https://docs.syncthing.net/users/contrib.html#mac-os) or else this application will not work!

Currently, macOS 11 or higher is necessary to run the latest version. For older version support, see the [FAQ](#faq-frequently-asked-questions). **syncthing-macos** is packaged as a disk image as an application bundled with the [syncthing](https://github.com/syncthing/syncthing/releases) binary.

To install [just download the DMG](https://github.com/syncthing/syncthing-macos/releases/latest), mount it and drag and drop the application to install. The only necessary configuration is to set the API key and URL when provisioning a remote syncthing instance, the local instance is auto-configured. The `syncthing-macos` application bundle disables the auto-updater of `syncthing` as it has its own update mechanism using [Sparkle](https://sparkle-project.org/).

The latest version is available at [GitHub Releases](https://github.com/syncthing/syncthing-macos/releases/latest), or it can also be installed using [homebrew](https://github.com/Homebrew/homebrew-cask) [`brew install --cask syncthing-app`](https://formulae.brew.sh/cask/syncthing-app)

# Why

All cross-platform approaches are not able to use all the native facilities Apple macOS provides. Including auto-updates,
 vector icon set (retina-ready) and creating an application bundle. GUIs are designed with XCode and everything
 is coded in a mix of Objective-C and Swift which is "the native approach".

# Goal

The goal of this project is to keep the native macOS Syncthing tray lean but usable. No graphs, no advanced configuration
 windows. It provides a very simple wrapper, so users may not be aware Syncthing ships as a command line application. It strives to have a usability of good-by-default and should always follow the [Apple Human Interface Guidelines](https://developer.apple.com/design/human-interface-guidelines/macos) to feel as much as a native application as possible.

# Known bugs

See the [issue tracker (bug tag filtered)]([https://github.com/syncthing/syncthing-macos/issues](https://github.com/syncthing/syncthing-macos/issues?q=is%3Aissue+is%3Aopen+label%3Abug)) for the current status.

# Contributions

[Contributions](CONTRIBUTING.md) and [issue reports](https://github.com/syncthing/syncthing-macos/issues) are welcome.

# License

[MIT](LICENSE)

# FAQ: Frequently asked questions

## macOS version support

* From release v2.0.14 macOS 12 is required (see issue [#275](https://github.com/syncthing/syncthing-macos/issues/275))
* From release v1.27.7 macOS 11 or probably higher is required (see issue [#218](https://github.com/syncthing/syncthing-macos/issues/218))
* Last v1.27.6-1 release is compatible with macOS 10.13 (see issue [#217](https://github.com/syncthing/syncthing-macos/issues/217))
* From release v1.20.0-1 macOS 10.13 or higher is required
* Until release v1.19.2-1 macOS 10.12 is required (see issue [#177](https://github.com/syncthing/syncthing-macos/issues/177))
* From release v1.14.0-1 macOS 10.12 is required
* Until release [v1.13.1-1](https://github.com/syncthing/syncthing-macos/releases/tag/v1.13.1-1) macOS 10.11 or higher is supported (see issue [#148](https://github.com/syncthing/syncthing-macos/issues/148) why)

Auto-update [must be manually disabled](https://github.com/syncthing/syncthing-macos?tab=readme-ov-file#disable-automatic-update-checker) for unsupported OS versions.

## Preferences

`syncthing-macos` is designed to run its own syncthing instance and automatically detect the API key.
The preferences window is used to point to a local running instance, a remote instance is not supported.
It is possible to run your own instance and point to it for advanced/development purposes.
You should only change the settings if you know what you are doing.

Setting extra Syncthing command line parameters is a hidden feature. You need to write these using
the application defaults configuration. The only current limitation the parameters cannot contain spaces!.
In the example below the audit log is enabled:

```
defaults write com.github.xor-gate.syncthing-macosx Arguments '--audit --auditfile=/Users/JohnDoe/staudit.log'
```

## Default IP address change

When the default IP address is changed from 127.0.0.1 to a routable one like e.g 192.168.1.102 the tray application
preferences need to be set also. Or else the API cannot be accessed and will stay 'Offline'. If you broke the
configuration you can manually edit the file under the `~/Library/Application Support/Syncthing/config.xml` using
Finder with Go -> Go to folder. And restart the syncthing service from the tray.

## Resolve xattr sync from macOS Ventura 13.0 to < 13.0 devices (problem with `com.apple.provenance` metadata)

When using the xattr synchronisation feature it fails when syncing from macOS 13.0 to macOS < 13.0.
When using this feature one must stop Syncthing and manually edit the configuration XML file located
at `/Users/<user>/Library/Application Support/Syncthing/config.xml`. Or the location when running an
Syncthing daemon instance not managed the application bundle). Manually editing the configuration file
is necessary because the web UI doesn't support xattr filter management just yet (release v1.22.1-1).

Per shared folder the `xattrFilter` must be configured as follows:

```
<folder id="..." ...>
  <xattrFilter>
    ...
    <entry match="com.apple.provenance" permit="false"/>
    <entry match="*" permit="true"/>
  </xattrFilter>
</folder>
```

NOTE: see the `com.apple.provenance` `xattrFilter` `entry`.

See also [#185](https://github.com/syncthing/syncthing-macos/issues/185) and the
[forum post](https://forum.syncthing.net/t/com-apple-provenance/19262) for more information.

## Uninstallation

On Mac OS X you drop the application from the Application folder to your Trash.
But there are some user specific files are kept elsewhere, which are located under
`$HOME/Library/Application Support/Syncthing`. The files in this folder are the configuration,
encryption/profile files and the database cache. For more information see
[docs.syncthing.net/users/config.html](https://docs.syncthing.net/users/config.html#description).

## Disable automatic update checker

By default the Syncthing macOS application checks automatically for updates. To disable (or re-enable) the
auto update check one must set the Sparkle updater parameter from the commandline:

```
defaults write com.github.xor-gate.syncthing-macosx SUEnableAutomaticChecks 0
```

This setting is un-adviced and therefor only available from the commandline. When your system is not
supported anymore and don't want to get notified of unsupported updates disabling then is recommended.

# Prerequisites for building/using everything in this repository

Before compiling git submodules needs to be present:

```
git submodule update --init
```

- Xcode, for the Objective-C/Swift compiler
- Python 3, for the update-release.py script
  - Needs [semver](https://pypi.org/project/semver/) from pip
- Cocoapods for updating Objective-C/Swift 3th party dependencies
- Golang, only needed for Sparkle GitHub Releases to Appcast XML tool

# Using XCode

The new `syncthing.xcworkspace` must be used when coding in XCode.

# Compiling from Terminal

Build with XCode or run:

```
make debug
```

It will automaticly download syncthing universal binary and add it to the Application Bundle.

For release builds signing the application build and creating an distributable DMG:

```
make release-dmg
```

The script will select the first available Developer ID and sign the app with it. To specify the signing identity, use `SYNCTHING_APP_CODE_SIGN_IDENTITY` environment variable:

```
SYNCTHING_APP_CODE_SIGN_IDENTITY="Mac Developer: foo@bar.com (XB59MXU8EC)" make release-dmg
```

# Design and useful information

## Settings

The Syncthing settings use the NSDefaults facility. From the commandline all settings can be shown with:

```
jerry@Jerrys-iMac ~ % defaults read com.github.xor-gate.syncthing-macosx
{
    ApiKey = rR7YrEDLKhNETJZKgySmnYPZvebY9qgk;
    Executable = "/Applications/Syncthing.app/Contents/Resources/syncthing/syncthing";
    SUEnableAutomaticChecks = 1;
    SUHasLaunchedBefore = 1;
    SULastCheckTime = "2021-01-08 12:05:53 +0000";
    SUSendProfileInfo = 0;
    StartAtLogin = 1;
    URI = "http://127.0.0.1:8384";
}
```

### Override Syncthing Daeomon `Executable` property (power-users only)

If you want to use the nice GUI but have your own executable located outside the `Syncthing.app` bundle,
then the `Executable` configuration parameter can be manually overwritten with the `defaults` commandline
tool using builtin Terminal or iTerm2. The last arguments should be changed to the syncthing daemon golang
application.

```
defaults write com.github.xor-gate.syncthing-macosx Executable /Users/jerry/develop/Syncthing/exe/syncthing
```

To restore it back to the bundle path just use delete of the property. It will automatically reset it back.

```
defaults delete com.github.xor-gate.syncthing-macosx Executable
```

## Dependency management

With [Homebrew](https://brew.sh/) package manager. And native XCode Swift packages (for Sparkle framework). 

## Versioning scheme

It uses the shipped syncthing executable version appended with a `-<bundle index>` number.
So for Syncthing `0.14.28` with first build/package it is versioned as `0.14.28-1`.
Currently there is no need for having a separate version for `syncthing-macos`. As it also
keeps the wrapper tightly coupled with the syncthing releases.

## Compilation and packaging process

* Xcode builds all sources
* Syncthing resource is fetched with `syncthing/Scripts/syncthing-resource.sh`
* Fancy DMG disk image is generated with `syncthing/Scripts/create-dmg.sh`
  * The version part of the DMG name is fetched from `syncthing/Info.plist, key CFBundleShortVersionString`
* Both the app bundle and the DMG are signed with the first available Developer
  ID certificate, if found (or the one specified through `SYNCTHING_APP_CODE_SIGN_IDENTITY` environment variable)

`syncthing/syncthing-macos` will only ship
[stable releases and no release candidates](https://forum.syncthing.net/t/introducing-stable-releases-and-release-candidates/9167)
of the Syncthing Service (daemon).

## Apple Application Notarize

After the dmg is created it must be send to Apple to be notarized. It can be checked with `spctl`
if the app is correctly verified by Apple for distribution:

```
spctl -a -t exec -vvv /Volumes/Syncthing/Syncthing.app
/Volumes/Syncthing/Syncthing.app: accepted
source=Notarized Developer ID
origin=Developer ID Application: Jakob Borg (LQE5SYM783)
```

When it is not correctly notarized the following output is seen (note the source):

```
spctl -a -t exec -vvv /Volumes/Syncthing/Syncthing.app
/Volumes/Syncthing/Syncthing.app: accepted
source=Developer ID
origin=Developer ID Application: Jakob Borg (LQE5SYM783)
```

See also the Apple Developer documentation at <https://developer.apple.com/documentation/xcode/notarizing_macos_software_before_distribution>

## Release management

Run `make update-release` from the toplevel Makefile to bundle latest Syncthing from GitHub.

To update the bundled syncthing the `make release-update` must be run from the main folder which does
basicly these steps automatically:
* Update `syncthing/Scripts/syncthing-resource.sh`, `SYNCTHING_VERSION`
* Update `syncthing/Info.plist`
  * `CFBundleShortVersionString`: User readable string (e.g `1.27.10-1`)
  * `CFBundleVersion`: Incrementing version counter (e.g `102701001` for `1.27.10-1`)

* When the git branch develop or release pushed to github the Github actions CI server automatically builds debug and release
* Manually download the release `.dmg` from [github.com actions](https://github.com/syncthing/syncthing-macos/actions/workflows/build-syncthing-macos.yml) which is correctly signed and notarized
* Manually [create a new Github release](https://github.com/syncthing/syncthing-macos/releases/new) with tag `v<major>.<minor>.<patch>-<bundle index>`
* Run deployment of Sparkle updater [appcast.xml](https://github.com/syncthing/syncthing-macos/actions/workflows/generate-appcast.yml). Which turns [GitHub Releases JSON into a Sparkle appcast.xml file](https://github.com/syncthing/syncthing-macos/tree/develop/cmd/ghreleases2appcast). (See also [Sparkle documentation](https://sparkle-project.org/documentation/)) to push to users.

## Support for additional languages

### 1. Add Language in Xcode

1. Open `syncthing.xcworkspace`
2. Select project root -> **Project -> Info -> Localizations**
3. Click **+** and select target language
4. Select all files when prompted

### 2. Translate

Edit files in `syncthing/[language_code].lproj/`:

```
/* Keep key, translate value */
"Up to date" = "Actualizado";
```

### 3. Update Info.plist

Add language code to `CFBundleLocalizations`:
```xml
<string>es</string>  <!-- New language -->
```

### 4. Test

```bash
make debug
open ./Build/Products/Debug/Syncthing.app --args -AppleLanguages '(language_code)'
```
