A single Thunderbolt port on a Mac can support a daisy chain of up to six Thunderbolt devices. This means you can connect up to six Thunderbolt devices in a series using Thunderbolt cables, with each device connected to the previous one. The last device in the chain must be a Thunderbolt device or a Thunderbolt-compatible display.
It's important to note that the number of devices you can connect may also depend on the bandwidth requirements of the devices themselves. Some high-bandwidth devices, such as 4K displays or external storage systems, may consume more of the available Thunderbolt bandwidth, which can impact the number of devices that can be connected in a chain.