32-bit vs 64-bit: Why Catalina Killed Thousands of Mac Apps | Expert Review

If you tried running an older app on a MacBook Air M4 or MacBook Pro M4 Max (2025), you may have noticed it doesn’t launch at all. That’s because starting with macOS Catalina (2019), Apple ended support for 32-bit apps and moved completely to 64-bit-only software.

This change improved performance, stability, and security across macOS, but it also meant thousands of classic apps — from games to professional tools — stopped working forever. For Apple, the move was part of its push toward a faster, more efficient Apple Silicon ecosystem, but for users, it created big compatibility headaches.

✅ 64-bit apps run faster and handle more memory
✅ 32-bit apps were permanently blocked in Catalina and later
✅ Old games and creative apps became unusable
✅ Apple Silicon Macs are fully optimized for 64-bit apps only
✅ Developers were forced to rebuild apps in 64-bit

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❓ FAQ: 32-bit vs 64-bit on macOS

1. Why did Apple kill 32-bit apps in macOS Catalina?
✅ To improve performance, security, and prepare for Apple Silicon.

2. Can I run 32-bit apps on macOS Sonoma or M-series Macs?
✅ No, they are permanently incompatible.

3. What happens to my old 32-bit games and apps?
✅ They won’t launch unless you use a virtual machine or emulator.

4. Which macOS versions still support 32-bit apps?
✅ macOS Mojave (2018) was the last to allow them.

5. Where can I buy a PTA-approved MacBook that supports 64-bit apps in Pakistan?
✅ From Victory Computers, with warranty and expert setup support.

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