Thunderbolt 5 supports 20Gbps USB 3.2x2 tunneling, however, it's optional. Does anyone know if the M4 Pro's T5 implementation supports it? If no one does, I'll be testing it out on a Macbook tomorrow and I'll answer my own question.
Mac mini (M4)
So I received a more comprehensive response from Intel. It seems to that a Thunderbolt 4/5 port will support 3.2x2 if it’s implemented natively on the system. If the native USB implemented by the SOC doesn’t support 3.2x2, neither will the Thunderbolt port. Basically, Thunderbolt is just handing off to the native USB.
As Apple’s USB seemingly doesn't support USB 3.2x2, neither will its Thunderbolt ports. Also, there is no physical impediment/incompatibility to implementing USB 3.2x2 over any Type-C port.
Hence, it seems I was basically correct in my assumption that this is an omission by Apple, not Intel.
If it does, Apple's being rather quiet about it.
The Technical Specifications for the M4 Pro and M4 Max MacBook Pros do not say what the maximum USB 3.* speed on the USB4 / Thunderbolt ports is.
We'll know tomorrow. I hope so. Some of those 20Gbps products are actually from Apple-centric dealers.
Apple. The relentless pursuit of near perfection.
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Does the M4 Pro Thunderbolt 5 implemenation support USB 3.2x2?
