For the most part, Macabacus installs just like any other Windows software. However, if you are having problems with installation, please follow the steps below carefully.
1. Sign into Windows as the end user
Sign into Windows as the end user, not an administrator (unless the administrator is the end user), before installing Macabacus.
2. Download the installer
Download the installer named
Macabacus-x.x.x.msi. Verify that this file name corresponds to the Office version installed on your PC. For Microsoft 365 and Office 2019 installations, the installer will be named
3. Run the installer
Run the installer. Request IT support for an "over-the-shoulder" installation if you do not have privileges to install software on your PC. Do not attempt to manually load the installer (.exe file) as an add-in in your Office applications via the native COM Add-ins or Add-ins dialogs.
The following Microsoft components (prerequisites) are required by Macabacus. If the installer cannot download or install a missing prerequisite for any reason, download it directly from Microsoft using the applicable link below and install it.
Microsoft .NET Framework (version 4.5 or later)
Microsoft Visual Studio 2010 Tools for Office (VSTO) Runtime
Full Office installation required
The full edition of Microsoft Office must be installed to support sophisticated VSTO add-ins like Macabacus. See our troubleshooting guide if the installer informs you that Office 2016 is not installed.
4. Sign out of Windows, if necessary
If an administrator performed an "over-the-shoulder" installation, sign out of Windows to complete the installation.
5. Activate or evaluate
Macabacus may prompt you for an email address upon starting Excel, PowerPoint, or Word. Enter either (a) the email address of an authorized user to activate Macabacus, if you have already purchased a subscription, or (b) the email address you expect to use to manage your subscription if you later decide to purchase Macabacus to initiate your free trial.
You can activate Macabacus at any time using these instructions. If you are a corporate user and your email address is not recognized when you try to activate, ask your Macabacus account administrator to configure your access.
If you do not see the Macabacus tab in your Office applications after installation, please see this troubleshooting guide.
This documentation refers to the latest Macabacus version. Some features and descriptions of these features may not apply to older versions of Macabacus. Update your Macabacus software to take advantage of the latest features.