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Repair guides, disassembly, and troubleshooting information for the third main redesign of Apple's popular Mac mini small form factor desktop PC, released October 2024. Features M4 and M4 Pro SoCs and a minimum of 16 GB of unified memory.

Number of thunderbolt 4 controllers

Is there one separate bus controller for each of the 3 thunderbolt 4 ports in the M4 Mac Mini?

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The M4 chip presentation implies each port is independent, there is no hub logic you often see in PCI based systems. Now how the chip handles the data movement between the ports is an unknown!

On back (M4):

  • Gigabit Ethernet port (configurable to 10Gb Ethernet)
  • HDMI port

Three Thunderbolt 4 (USB-C) ports with support for:

  • Thunderbolt 4 (up to 40Gb/s)
  • USB 4 (up to 40Gb/s)
  • DisplayPort

On back (M4 Pro):

  • Gigabit Ethernet port (configurable to 10Gb Ethernet)
  • HDMI port

Three Thunderbolt 5 (USB-C) ports with support for:

  • Thunderbolt 5 (up to 120Gb/s)
  • USB 4 (up to 40Gb/s)
  • DisplayPort

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