How to Install Reunion 7: A Complete Setup Guide

Reunion 7 is a genealogy software application developed by Leister Productions for macOS. It allows users to build, organize, and visualize family trees, manage records, and store multimedia files tied to individual ancestors. If you've recently purchased or downloaded Reunion 7 and aren't sure how to get it running, this guide walks through the installation process, what to expect at each stage, and the variables that can affect how smoothly setup goes.

What Is Reunion 7 and What Does It Run On?

Reunion 7 is a Mac-native application, meaning it was built specifically for Apple's macOS environment. It is not available for Windows or Linux. This matters upfront because system compatibility is one of the first things to check before installation begins.

The software was designed for older macOS versions, and this is where many users run into friction. Reunion 7 predates several macOS updates, which means running it on a modern Mac may require additional steps or may not be fully supported depending on your current operating system version. Newer releases of Reunion (versions 10, 11, 12) have since replaced version 7, so if you're working with version 7 specifically, you're likely either using an older Mac, restoring a legacy setup, or working from an older purchased license.

Before You Begin: System and File Checks

Before launching the installer, confirm a few things:

• macOS version compatibility — Reunion 7 was designed for macOS versions in the early-to-mid Intel Mac era. Running it on macOS Catalina (10.15) or later will not work, because Apple removed support for 32-bit applications in Catalina. Reunion 7 is a 32-bit app.
• Installer source — You need either the original install disc or a legitimate downloaded installer file (typically a .dmg disk image). Confirm the file is complete and untampered.
• Available disk space — The application itself is relatively lightweight, but genealogy databases with photos, documents, and media can grow significantly over time.
• Admin access — You'll need administrator privileges on your Mac to install software.

Step-by-Step: Installing Reunion 7

1. Locate Your Installer

If you have a physical disc, insert it into your Mac's optical drive (or an external DVD drive if your Mac doesn't have one built in). The disc should mount and display its contents in Finder.

If you have a downloaded .dmg file, double-click it to mount the disk image. A virtual drive will appear on your desktop or in the Finder sidebar.

2. Open the Disk Image Contents

Once the installer is mounted, you'll see the Reunion 7 installer package — typically named something like Reunion 7 Installer.pkg or similar. Double-click to launch it.

3. Follow the Installer Prompts 🖥️

The standard macOS installer walkthrough will guide you through:

• License agreement — Read and accept to proceed
• Installation destination — This defaults to your main Applications folder, which is the recommended location
• Installation type — Standard install is appropriate for most users; custom options may appear but are rarely necessary
• Authentication — Enter your Mac administrator password when prompted

Click Install and allow the process to complete. It typically takes only a minute or two.

4. Launch Reunion 7

Once installation finishes, open your Applications folder and double-click the Reunion 7 icon. On first launch, you may be prompted to enter a serial number or license key — have this ready from your original purchase documentation.

Opening an Existing Family File

If you're reinstalling Reunion 7 and already have a Reunion family file (.reu file extension) from a previous setup or backup, you'll open it through File > Open within the application. Family files are self-contained and portable, so moving them between Macs or restoring from a backup is straightforward as long as the software version matches.

The 32-Bit Compatibility Problem

This is the most significant variable affecting Reunion 7 installations today. Here's a quick breakdown:

If your Mac is running Mojave, you may see a warning that Reunion 7 is a 32-bit app "not optimized for your Mac," but it will typically still run. On Catalina or newer, the app simply won't open.

Users on newer macOS versions who need Reunion functionality will need to look at upgrading to a current version of Reunion, or use an older Mac that remains on a compatible macOS version.

Variables That Affect Your Installation Experience

Not every Reunion 7 install follows the same path. Several factors shape what you'll encounter:

• macOS version — As covered above, this is the most critical variable
• Mac hardware generation — Older Intel Macs are more likely to run compatible macOS versions; Apple Silicon Macs (M1, M2, M3) run macOS versions that don't support 32-bit apps at all
• Original purchase type — Disc vs. download affects how you access the installer and whether media degradation or file corruption is a factor
• Existing family data — If you have large media-linked databases, storage and organization planning matters more from the start
• Technical comfort level — The installer process itself is straightforward, but troubleshooting compatibility issues requires comfort navigating macOS system settings 🔧

What Happens After Installation

Once running, Reunion 7 operates as a standalone local application — your data stays on your Mac rather than in the cloud. This is a meaningful difference from web-based genealogy platforms, with implications for backup strategy. Because there's no automatic sync, regular manual backups of your .reu file to an external drive or cloud storage service are an important habit to build.

Whether Reunion 7 is the right long-term tool depends on factors specific to your situation — your Mac's age and OS version, how actively you plan to develop your family tree, and whether you need features that later versions introduced. The installation process itself is uncomplicated when the compatibility conditions are met, but those conditions narrow considerably depending on the hardware and software environment you're working in. 🌳