Daisy-chaining works, but you only get two ports.

Yes, you can daisy-chain Thunderbolt 4 devices on a MacBook Air, but you’re limited by the hardware. There are only two Thunderbolt/USB4 ports, and they share bandwidth with each other and with the display output. So each port can support a chain of up to six devices (theoretical Thunderbolt limit), but realistically you’ll hit performance bottlenecks long before that.

The catch: if you’re chaining storage drives or multiple displays, bandwidth gets split. Each Thunderbolt 4 port has 40 Gbps total. A single high-res monitor can eat 20–30 Gbps, leaving little for other devices. For peripherals like docks, audio interfaces, or slower USB devices, daisy-chaining is fine.

If you need serious multi-device setups, you’re better off with a Thunderbolt 4 hub or dock. The Air’s port count is the real bottleneck, not the daisy-chaining protocol itself.

Don’t expect to chain three 4K displays and two NVMe drives through one port and have everything run full speed. Physics wins.