M3 handles 4K slightly better, but M2 is still fine.

For most edits in Final Cut Pro, the M3 Air is noticeably faster on exports and timeline scrubbing with heavy effects, but the M2 Air isn’t slow. If you’re just cutting talking heads or light color grading, the difference won’t justify the upgrade.

The M3 gains hardware-accelerated AV1 decode and a faster media engine. That speeds up transcoding and playback for some codecs, especially if you’re dealing with h.265 or ProRes RAW. But the M2 already had ProRes acceleration. The gap narrows once you realize both machines throttle under sustained loads because they have no fan.

Where the M3 pulls ahead is export times — maybe 20-30% faster on a 4K timeline with multiple effects. Real-world editing latency feels similar unless you’re stacking layers and heavy plugins. If you own an M2 Air, don’t feel pressured. If you’re buying new and the price difference is small, get the M3.

The Air is still not a MacBook Pro. If you edit 4K all day, buy a fan.