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About Quicksilver

Quicksilver is a fast and free macOS productivity application that gives you the power to control your Mac quickly and elegantly. Quicksilver learns your habits, making your everyday chores simple and efficient. Learn more at:

About This Code Repository

This repository contains the source code for the Quicksilver main app. It is also the place to browse existing issues and open new issues, via the issue tracker.

The main branch contains the source for the currently released Quicksilver.

If you want more info about Quicksilver you can read the about page or view it on Wikipedia. For help and support, visit the Quicksilver Support Group. Developers can find help in the Developer Support Group

Where to download Quicksilver?

Visit, and download the right version for your operating system.

Before Trying the Source Code

Before building and testing Quicksilver, ALWAYS BACKUP your user data! This is easily done by backing up the following:

  • ~/Library/Application Support/Quicksilver
  • ~/Library/Caches/Quicksilver
  • ~/Library/Preferences/com.blacktree.Quicksilver.plist

Now if anything happens you can always restore the exact state Quicksilver was in before your were trying out this version. When switching between versions, you should generally clear caches with

rm -r ~/Library/Caches/*Quicksilver

Getting Started with Development

The Map should give you a head start if you're approaching this project for the first time.

Multiple copies of on your Mac

Having multiple copies of on the system can cause issues with the Services System in OS X and AppleScript.

Specifically, Services will not register properly when the pasteboard server (/System/Library/CoreServices/pbs) sees multiple packages each with their own Info.plist file defining the same services. AppleScript will also get confused with more than one on your Mac.

In order to ensure that the Services System and AppleScript work correctly, zip any old packages you want to keep, so you only have one file on your filesystem. Also do not forget to empty your trash after you deleted the older packages.


You should be able to build Quicksilver by following the instructions as seen in the Quicksilver Wiki on Building Quicksilver.

Legal Stuff

By downloading and/or using this software you agree to the following terms of use:

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this software except in compliance with the License.
You may obtain a copy of the License at

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
See the License for the specific language governing permissions and
limitations under the License.