For most M3 MacBook Air owners, upgrading to the M4 MacBook Air isn't necessary. The improvements matter, but they're incremental rather than transformational.
Performance gains:
- 17-24% faster in general benchmarks
- 10 CPU cores versus 8 on the M3
- Neural Engine runs twice as fast (38 trillion operations per second)
- Memory bandwidth increased 20% to 120GB/s
- Maximum RAM now 32GB (up from 24GB)
The standout upgrade: External display support
This is the headline change. The M3 only supported two external monitors with the lid closed. The M4 can drive two 6K displays while keeping the built-in screen active. Three screens total, laptop open.
If the clamshell-only limitation frustrated you on the M3, this alone might justify upgrading.
Other notable changes:
- 12MP Center Stage camera (up from 1080p)
- Price dropped $100 to $999 starting
- New Sky Blue color replaces Space Gray
Upgrade if you:
- Need dual external monitors with laptop open
- Require more than 24GB RAM
- Rely heavily on Apple Intelligence features
- Own an M1, M2, or Intel MacBook Air
Skip if you:
- Are satisfied with M3 performance
- Don't use multi-monitor setups
- Don't work with AI-heavy applications
The real opportunity:
Coming from an M1, M2, or Intel Mac? The M4 delivers substantial improvements in performance, display flexibility, and camera quality at a lower price than the M3 launched. That's a compelling package.
Coming from an M3? Unless you need that dual-monitor fix, your current machine will serve you well for years.
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How we researched this
Where this comes from: this answer draws on the product's published specifications and the reviews ShopSavvy collected for it, alongside prices from ShopSavvy's price data.
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