With the IB-DK4061-CPD docking station model from Icy Box, you can connect two screens to your MacBook with M4 Max, but with limitations: The docking station supports two video outputs via HDMI with resolutions up to 3840×2160 at 60 Hz or 7680×4320 at 30 Hz, but it is not a Thunderbolt docking station, but USB-C based. For Macs with M4 Max that support Thunderbolt 5, a Thunderbolt docking station is usually required for two external monitors, as USB-C docks can often only drive one external display natively.

In concrete terms, this means that you can connect two monitors, but macOS may only recognise one external monitor via this docking station as it does not support Thunderbolt. For reliable use of two external monitors on the M4 Max MacBook, we recommend a Thunderbolt docking station that explicitly supports dual display via Thunderbolt.

To summarise: You can connect two monitors with this Icy Box docking station, but your MacBook M4 Max will probably only be able to recognise and use one external monitor. For full dual-monitor setup on the M4 Max, a Thunderbolt docking station is required.