Features & Functionality

Which version control clients officially support Kaleidoscope 2?

Please email us if you use a program that you would like to see integrated with Kaleidoscope 2.

Are there any differences between the Direct Sale and Mac App Store versions of Kaleidoscope?

The Mac App Store version has some differences to comply with Application Sandboxing:

  • “Open in Terminal” has been removed from the Path Bar context menu.
  • ksdiff must be installed using a separate download.
  • The Mac App Store version is sandboxed, Direct Sale is not.
  • The Mac App Store version requires git and svn to be installed at /usr/bin/
  • The Direct Sale version can use ‘xcrun’ to find git and svn that is included with Xcode.

(Upgrading, Mac App Store)

How do I purchase Kaleidoscope 2?

You can purchase directly from Letter Opener GmbH from within Kaleidoscope, click the green "Buy" button in the window title bar and complete the purchase form. You can also visit our web store if you are purchasing multiple licenses, or prefer to order on the web.

Kaleidoscope 2 is also available on the Mac App Store.

Do you offer multiple license discounts?

Yes, we do. Send us an email describing your license needs, and we will get back to you shortly.

Is there an upgrade discount for Kaleidoscope 1 customers?

The upgrade price for the Direct Sale version of Kaleidoscope 2 is $34.99.

If you have a Direct Sale license you can enter your license here to generate a coupon. Kaleidoscope 1 Mac App Store customers can send their purchase receipt to support to receive a discount coupon to purchase a Direct Sale upgrade.

Upgrade pricing is not available on the Mac App Store.

Can I switch my license from the Mac App Store to Direct Sale version (or vice versa)?

The Direct Sale version of Kaleidoscope 2 will detect a Mac App Store license of Kaleidoscope 2 (if previously installed) and automatically activate. Apple does not provide a means to transfer a Direct Sale license to a Mac App Store license.

Is there a student discount for Kaleidoscope 2?

Please email Kaleidoscope Support with proof of your academic status (such as photo of your Student ID, or by emailing from your academic address) for assistance.

Technical Support

How do I send feedback or ask for help?

From Kaleidoscope 2 you can go to the Help menu and select "Send Feedback…", or you can email us at support@kaleidoscope.app.

Can I use Kaleidoscope 2 with Snow Leopard (OS X 10.6.x)?

Kaleidoscope 2 requires macOS 10.12 or newer.

Why can't I launch Kaleidoscope from my version control client?

Kaleidoscope 2 requires installation of the Kaleidoscope Command-line tool (ksdiff) to work with version control clients, as well as command-line version control utilities such as git and svn. You can install ksdiff via the Integration option under the Kaleidoscope program menu.

How do I activate Kaleidoscope on a new Mac?

Kaleidoscope can be activated by either using the "Click to Activate" link in your order confirmation email, or by downloading the license file from the same email, and dragging it into the Registration window.

I've lost my license email. How can I get a new copy of it?

Send an email to Kaleidoscope Support for assistance.

Features & Functionality

What are the differences between Kaleidoscope Mac and iOS?
  • Kaleidoscope for iOS doesn’t currently support merging changes between files or folders.
  • Image Compare only has Absolute Difference rendition, not Proportional.
  • There is no GIT or other VCS integration at this time.
  • There is no support for multiple documents in a single scope.
  • Views automatically adapt to changes in split screen.


Kaleidoscope is free to download from the App Store. We offer a two-week trial that lets you try all the Pro features for free. You can purchase the Pro version with an In-App Purchase.

Once your trial expires, the free version of Kaleidoscope will allow you to compare a single set of folders.

Technical Support

There are three ways to add folders to a comparison:
  1. Open the document picker, enter Select mode, select two folders, and tap “Open.”
  2. From the Files.app, enter Select mode, select two folders, and then touch-hold and drag the two folders into the Kaleidoscope.
  3. Touch-hold and drag a single folder from Files.app at a time (Files.app doesn't currently support selecting more than one folder outside of Select mode).


Can’t find an answer to your question here? Send us an email and we’ll help you.