CalDigit TS4 Review: Still the Dual-4K Thunderbolt 4 Desk Default?

Last updated: September 28, 2026

Research review synthesized from CalDigit specifications, firmware release notes, and cross-checked long-term Mac/Windows docking write-ups. RavenSkye has not finished an instrumented in-house lab pass yet — every claim below is labeled as research, not our own bench numbers.

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CalDigit TS4 18 Port Thunderbolt 4 Dock, 98W Charging, 3X TBT4 (4…

$379.99

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The CalDigit TS4 is the docking station people recommend when they are exhausted by docking stations. For three-plus years it has occupied the “default premium Thunderbolt 4 desk” slot: eighteen ports, up to 98W host charging, 2.5 Gigabit Ethernet, UHS-II card readers, and enough downstream Thunderbolt bandwidth to keep an external SSD and a display chain from fighting each other — at least on hosts that were designed for that life.

It is also ~$380–400 of commitment. This review exists to decide whether that commitment matches your laptop, not the marketing laptop on the box.

Who it’s for

Buy the TS4 if you sit down once in the morning, plug one Thunderbolt 4 cable, and expect the rest of the day to vanish into monitors, wired LAN, SD cards, and peripherals. Typical fits:

• MacBook Pro with M-series Pro or Max silicon (or Intel Macs) that natively drive two or more externals
• Windows Thunderbolt 4 / USB4 workstations that need dual 4K@60 plus dense I/O
• Photographers and video editors who still ingest from UHS-II SD and want 2.5GbE to a NAS
• Anyone daisy-chaining a Thunderbolt RAID or leaving a TB display in the chain

Who should not buy it

• Base M1/M2 MacBook Air/Pro owners hoping the dock invents a second native display — Apple’s limit is the host, not the dock
• Dell Latitude/Precision fleets that specifically need ExpressCharge ~130W (buy a Dell WD dock)
• Travelers who need a 6-port palm hub, not an 18-port brick with a separate PSU
• Windows-only shoppers who are happy with Anker 568 dual 4K@60 and do not need 2.5GbE or card readers

Verdict (research)

The TS4 remains the strongest “one and done” Thunderbolt 4 desk dock in mainstream research consensus for 2026 — not because it is flawless, but because competing docks usually force you to give up Ethernet speed, card readers, or PD headroom. Pay for it when those ports are weekly habits. Otherwise step down to Plugable TBT4-UD5, OWC Thunderbolt Go, or a platform-specific Dell/Anker pick.

Ports & charging table

Display reality (read this twice)

Thunderbolt docks advertise resolutions that assume a capable host GPU and display engine. On Windows TB4 laptops and Intel Macs, dual 4K@60 is a realistic planning target with proper cables. On Apple Silicon, Pro/Max chips (and certain newer multi-display base configs) can drive multiple externals — sometimes into 5K/6K territory with DSC. Base M1 and M2 machines remain capped at one native external regardless of how many DisplayPorts CalDigit stamped on the rear panel.

If your brief is “base M2 Air, two 4K monitors, lid open,” you need a DisplayLink strategy (and its DRM/CPU trade-offs), not a more expensive TS4.

Pros

• Best-in-class everyday port density without resorting to a second hub
• 98W PD covers most professional 14–16″ notebooks under mixed load
• 2.5GbE is a quiet quality-of-life upgrade for large file desks
• Mature Mac + Windows documentation and a huge installed base of troubleshooting lore
• Audio I/O that many “clean” docks quietly deleted

Cons

• Premium price; easy to overspend if you only need HDMI + three USB ports
• Cannot defeat Apple Silicon base-chip display limits
• Historical sleep/wake and volume-mount quirks on some macOS versions — firmware updates matter
• Separate AC adapter means one more brick under the desk
• Not optimized for Dell ExpressCharge fleets

Firmware & reliability notes

CalDigit has shipped multiple firmware revisions addressing sleep/wake and storage remount behavior as macOS security and power policies evolved. Treat “update firmware on day one” as part of unboxing, not optional tinkering. If you buy warehouse/used stock, assume it may ship on older firmware and plan 15 minutes for the utility.

Also use a certified Thunderbolt / USB4 cable if you replace the included lead. Charge-only USB-C cables are the fastest way to convince yourself the dock is broken.

How we’d set it up on a dual-4K desk

1. Mount or park the dock where the PSU and Ethernet can stay permanent.
2. Connect primary panels using the DP/TB combination CalDigit documents for your OS.
3. Put the busiest Thunderbolt SSD on a downstream TB4 port; keep low-speed peripherals on USB-A.
4. Validate dual 4K@60 in Display settings before installing every USB gadget at once.
5. Only then migrate card-reader and audio workflows so troubleshooting stays layered.

TS4 vs common alternatives

• vs OWC Thunderbolt Go / Plugable TBT4-UD5: Those win on price and simplicity; TS4 wins on ports, 2.5GbE, and charging headroom.
• vs Dell WD22TB4: WD22TB4 wins for Dell ExpressCharge fleets; TS4 wins for mixed Mac/Windows creator desks.
• vs Anker 568: Anker wins for Windows-only USB4 value; TS4 wins when you need Mac trust + card readers + 2.5GbE.

FAQ

Will the TS4 give dual 4K on a base M1 MacBook Air?
No. Host limit.

Is 98W enough for a 16″ MacBook Pro?
Usually for desk work; heavy sustained CPU/GPU loads may still sip from the MagSafe/USB-C brick depending on configuration — check Apple’s wattage guidance for your year.

Do I need Thunderbolt 5 instead?
Only if you already own TB5 hosts and need the newer bandwidth/PD ceiling. Dual 4K@60 desks are still well served by TB4.

Keep comparing in our guides: Dual-4K Thunderbolt/USB4 roundup · MacBook docks (M1–M5) · Home

Keep comparing: CalDigit TS4 vs TS5 vs TS5 Plus if a Thunderbolt 5 host is on the table.

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