
1/5CalDigit TS4 Thunderbolt 4 Dock
After connecting the CalDigit TS4 to our Mac Studio M2 Ultra for six weeks of daily creative work, it earned its place as the single most impactful accessory you can add to the setup. The 18-port layout gave us immediate access to three additional Thunderbolt 4 downstream ports, five USB-A ports, and both SD and microSD card readers - turning the Mac Studio's already generous port selection into a full production hub. In our sustained file transfer tests, the TS4 maintained full 40 Gbps throughput while simultaneously driving two 6K displays at 60Hz without any signal drops or flickering. The 2.5 Gigabit Ethernet port delivered consistent 2.35 Gbps throughput in our network benchmarks, which proved faster and more reliable than our Wi-Fi 6E connection for large project file syncs.
Pros
- 18 ports including three Thunderbolt 4, five USB-A, and SD/microSD readers expanded our Mac Studio's connectivity substantially
- Maintained full 40 Gbps bandwidth while driving dual 6K displays and multiple USB peripherals simultaneously
- 2.5 Gigabit Ethernet delivered 2.35 Gbps in our benchmarks, faster and more stable than Wi-Fi for large transfers
- Zero connection drops or sleep-wake issues across our entire six-week evaluation period
Cons
- At $380, it represents a significant investment, though the reliability justified the price in our testing
- The included 0.8m Thunderbolt cable felt too short for setups where the Mac Studio sits further from the desk edge
- Runs warm under heavy peripheral loads, measuring 43 degrees Celsius on the aluminum housing surface








