How to Resolve Software Compatibility Problems

Run Program in Compatibility Mode

• Right-click program's .exe file or shortcut
• Select Properties
• Click Compatibility tab
• Check "Run this program in compatibility mode for:"
• Select older Windows version (e.g., Windows 7, Windows XP)
• Click Apply, then OK
• Launch program to test

Use Compatibility Troubleshooter (Automatic)

• Right-click program → Properties → Compatibility tab
• Click "Run compatibility troubleshooter"
• Select "Try recommended settings"
• Click "Test the program" to try settings
• If works, click "Yes, save these settings"
• If doesn't work, try "Troubleshoot program" for manual options

Additional Compatibility Settings

• Reduced colour mode: For old games needing 16-bit colour
• Run in 640×480 resolution: For software designed for old monitors
• Run as administrator: For programs needing elevated permissions
• Disable fullscreen optimisations: For games with display issues
• Test combinations of settings until program works

Program Compatibility Assistant

• Windows detects incompatible programs automatically
• Popup appears after program closes or fails
• Click "Run the program using recommended settings"
• Windows applies best guess at compatibility settings
• Save settings if program runs successfully

Rosetta 2 (Intel Apps on Apple Silicon)

• M1/M2/M3 Macs can run Intel-only apps via Rosetta 2
• First time opening Intel app, Mac prompts to install Rosetta
• Click "Install" and enter password
• One-time installation, works for all Intel apps
• Apps run slightly slower but usually unnoticeable

Manually Install Rosetta 2

• Open Terminal (Applications → Utilities → Terminal)
• Type: softwareupdate --install-rosetta
• Press Enter, then A to agree to licence
• Installation takes 1-2 minutes
• No restart needed

32-bit Apps on macOS (No Longer Supported)

• macOS Catalina (2019) and newer don't support 32-bit apps
• Check if app is 32-bit: Apple menu → About This Mac → System Report → Applications
• Options: Contact developer for 64-bit update, find alternative app, or use virtual machine with older macOS

Windows Programs on Mac

• Use Parallels Desktop (paid) or VirtualBox (free) to run Windows
• Install Windows 10/11 in virtual machine
• Install Windows programs inside virtual Windows
• Requires Intel Mac or Parallels with Windows 11 ARM on Apple Silicon

When to Use Virtual Machines

• Software absolutely won't run in compatibility mode
• Need complete old operating system (Windows XP, Windows 7)
• Running Windows software on Mac or Linux
• Testing software in isolated environment
• Business software requiring specific OS version

VirtualBox (Free, Beginner-Friendly)

• Download from virtualbox.org
• Install VirtualBox on host computer
• Obtain Windows installation media (ISO file)
• Create New Virtual Machine in VirtualBox
• Allocate RAM (4GB minimum) and disk space (50GB recommended)
• Install Windows in virtual machine
• Install legacy software inside virtual Windows

VMware Workstation (Professional Option)

• Better performance than VirtualBox
• Easier file sharing between host and guest
• Paid software (£200+) but free trial available
• Supports newer features like 3D graphics

Windows 10/11 Built-in Hyper-V (Pro/Enterprise Only)

• Windows → Turn Windows features on or off
• Enable Hyper-V (requires Windows Pro or Enterprise)
• Restart computer
• Open Hyper-V Manager from Start menu
• Create virtual machine for legacy Windows version

Licensing Considerations

• Windows in virtual machine requires separate licence
• Windows 7/8/10 can be purchased from Microsoft
• Or use existing licence key if you have one
• Linux virtual machines are free and don't need licence

Office Software Alternatives

• Old Microsoft Office: Use Microsoft 365 (subscription), LibreOffice (free), or Google Workspace
• WordPerfect: LibreOffice Writer can open old WordPerfect files
• Lotus 1-2-3: Excel or Google Sheets with file conversion

Design & Creative Software

• Old Adobe CS versions: Upgrade to Creative Cloud or use Affinity suite (one-time purchase)
• CorelDRAW: Use latest version or switch to Adobe Illustrator
• Paint Shop Pro: GIMP (free) or Photoshop Elements

Accounting & Business Software

• QuickBooks (old versions): Upgrade to QuickBooks Online or switch to Xero
• Sage (legacy): Upgrade to Sage 50cloud or Sage Business Cloud
• Custom database apps: Consider rebuilding in modern platform or cloud service

Games

• Old PC games: GOG.com sells updated versions compatible with modern Windows
• DOSBox: Free emulator for very old DOS games
• Steam: Many classic games updated for modern systems

When to Migrate vs. Maintain Legacy

Migrate to modern software if:

• Security updates no longer available
• Software can't run on modern hardware
• Files can't be shared with others
• Modern alternatives offer better features

Keep legacy software if:

• Business-critical with no suitable replacement
• Custom-built for specific workflow
• Migration costs exceed maintaining virtual machine
• Works perfectly in compatibility mode or VM