Download – OrganAssist 3.2

OrganAssist is maintained in my spare time. I will try to resolve any problems and am happy to attempt developing OrganAssist to support new manufacturers if necessary. Please use the Contact Page to give feedback or ask any questions.

Windows Installer – XP to 10

Note – OrganAssist is NOT supported for use on systems with the G.O. software installed.   The effects reported include random freezes and crashes even if G.O. is not running.  Uninstalling G.O. and then re-installing OrganAssist may possibly resolve the issue in some cases.

Existing Users – please back up your Documents/OrganAssist folder prior to installing.

Click on this button to download (Filesize: 17 MB)

Windows SmartScreen Warning As an independent developer I do not have the resources to certificate the program installer and so users of recent versions of Windows may get a warning message “Windows protected your PC”. If you click on More Info and the Run Anyway, OrganAssist should install correctly.

macOS – High Sierra and Mojave only

OrganAssist should run on any Mac computer made from mid-2009 to mid-2019 provided it is running one of these versions of macOS.
It is a 32 bit app (and cannot be upgraded) and so will NOT run on Catalina or later versions of macOS.

*** IMPORTANT *** – To run OrganAssist on macOS you will need to download both OrganAssist and also the OA Midi Helper application.  This is required to prevent MIDI data loss on input to OrganAssist.  Please see the User Manual for instructions on configuring your macOS setup.

Due to security measures in macOS , this application may NOT run if activated from the Downloads folder.  Move the application to your desktop or other location and use control + click to open it the first time.

Both applications are CodeSigned which means that macOS will validate the application and give a warning message if it has been damaged during the download. Downloading a second time should resolve any problems.

Click on this button to download (Filesize: 98 MB)

Click on this button to download (Filesize: 3.4 MB)

macOS – Gatekeeper Security

If you have already run OrganAssist from the Download folder then this has created an invalid folder elsewhere that prevents OrganAssist from running permanently. To solve this problem you must go to your Home/Library/Application Support folder and delete any folder(s) starting with com.organassist (the name will include a random number). After deleting any com.organassist folders, move the application from Downloads to another location using Finder and then run it again.


You can read the user manual online by Clicking Here

You can download the User Manual – PDF File

You can read the list of changes since Version 3.2 here – Release Notes


You can see a series of videos about using OrganAssist on the Videos Page

Updated or new organs layouts

To use a new organ layout just copy the downloaded file into your Documents/OrganAssist/Organs folder and restart OrganAssist