MacBook Air M2 to M4 Upgrade: Should You Make the Switch?
MacBook Air M2 vs M4 — performance comparison, real-world differences, and whether the upgrade is justified for different types of users in 2026.
The MacBook Air M2 launched in June 2022. The MacBook Air M4 launched in March 2025. If you own an M2 Air, the question is whether the M4 is a meaningful upgrade — or whether you should hold your machine for another 2-3 years.
What Changed M2 → M4
CPU Performance: ~35-45% Faster
Apple's M4 chip is approximately 35-45% faster than M2 in sustained CPU workloads (video rendering, compilation, ML inference). In light tasks — web browsing, documents, email, Zoom calls — you will feel zero difference. The gap shows in tasks that push the CPU for more than a few seconds.
If you compile large Swift codebases, run local LLMs, edit 4K video in Final Cut Pro, or use ML-heavy creative apps (Stable Diffusion locally, etc.) — the M4 Air handles these noticeably faster than the M2.
Verdict: Invisible in typical daily use. Significant for compute-heavy workflows.
Display: 15.3" Option + Brighter
M4 Air added a 15.3" model option (vs 15.3" M3 Air already existing). The 13" M4 display hits 500 nits peak vs the M2's 500 nits — essentially the same. Color accuracy is consistent across M2 and M4 models.
Memory Bandwidth: Much Faster
M4 has 120GB/s memory bandwidth vs M2's 100GB/s. This matters most for GPU-accelerated tasks, running local AI models, and video work. For standard productivity, irrelevant.