Side by side
MacBook Air 15-inch M3 vs. M4
Both have soldered, non-upgradeable memory and storage — compare max memory, ports, charging and external display support.
Not exact model
Not exact model
Key differences
- Max RAM: MacBook Air (15-inch, M3, 2024) 24 GB · MacBook Air (15-inch, M4, 2025) 32 GB
- Dock capability: MacBook Air (15-inch, M3, 2024) Thunderbolt 3 · MacBook Air (15-inch, M4, 2025) Thunderbolt 4
| MacBook Air (15-inch, M3, 2024) | MacBook Air (15-inch, M4, 2025) | |
|---|---|---|
| RAM upgradeable | no | no |
| Max RAM | 24 GB | 32 GB |
| Memory type | Unified Memory (LPDDR5) | Unified Memory (LPDDR5) |
| RAM slots | 0 | 0 |
| Soldered memory | 8 GB | 16 GB |
| Storage upgradeable | no | no |
| Storage slots | 1 | 1 |
| Storage interface | SSD | SSD |
| SSD PCIe generation | Unknown | Unknown |
| USB-C charging | yes | yes |
| Recommended PD wattage | Unknown | Unknown |
| Max external displays | 2 | 2 |
| Dock capability | Thunderbolt 3 | Thunderbolt 4 |
Specifications can vary by region, configuration and revision. See each model’s own page for sources and full details.