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What are Types of Ports?

See original GitHub issue

The documentation, list 9 says it this way:

Go into the P. Edit & Create USBMap.kext menu and change the types to match the physical port types and toggle which ports (up to 15) you want to preserve.

Okay, so in the terminal, while using the tool, it says:

  • Change types using this formula T:1,2,3,4,5:t where t is the type

But… what is the type?

I assume the type is written with big and small letters, so it’s why it’s Tt there. Or not?

Is it S or A?

  • S:1,2,3,4,5:sS for speed,
  • or A:1,2,3,4,5:aA for USB-A

Is it 2 and 3?

  • or should it be 2:1,2,3,4,5:22 for USB-2
  • and then 3:1,2,3,4,5:33 for USB-3

Is it HS and SS?

  • or is it HS:1,2,3,4,5:hsHS for High Speed
  • and then SS:1,2,3,4,5:ssSS for Super Speed

Is it H plus s and S plus s?

  • or is it H:1,2,3,4,5:sH and s for High Speed
  • and then S:1,2,3,4,5:sS and s for Super Speed

Is it always T plus only different type in the end of the line?

  • T:1,2,3,4,5: + letter or number?

In my listing I have it written this way:

[#]  1. HS01 | AppleUSB20XHCIPort |  1 (01000000) | 14100000 | Type 3
[#] 18. SS04 | AppleUSB30XHCIPort | 19 (13000000) | 14200000 | Type 3

So what a type is here? HS and SS in the beginning of the line, or the number after each Type word? I have 3 for all the ports I have.

I assume this step is needed, that’s why it’s written. But I have absolutely no idea what does it do here, why won’t I skip it and how to make it.

Would be great to explain.

Issue Analytics

  • State:open
  • Created a year ago
  • Comments:7 (1 by maintainers)

github_iconTop GitHub Comments

corpnewtcommented, May 31, 2022

Hey there - it seems that you’ve found out what the type values are for (they represent the physical port the port personality is attached to). Yes, type 0 is for USB 2 Type-A, and type 3 is for USB 3 Type-A ports. Worth noting that USBMap also has a T menu in the P. Edit & Create USBMap.kext menu which displays the same table as USBMapInjectorEdit (relevant code linked here).

As for why we set the types - macOS uses that information to determine whether things can be hot-plugged (plugged in after boot), and setting proper port types can help with some sleep issues.

Regarding documentation - I’ve been trying to get the drive to write a full fledged guide on the topic - but there’s tons to cover, and I haven’t gotten around to it yet. I know it’s difficult to locate at times, and there are some cyclic sources out there. If you have other questions, feel free to ask here, and if I know the answers I’ll chime in though.


walteweisscommented, May 31, 2022

So, summarizing the long post. I think it may be closed, as my issue was solved, by trials and errors.

But before doing that I would recommend to add some info for the type somewhere (at least

Maybe add some more info in the tool, like that:

Change types using this formula T:1,2,3,4,5:t where t is the type (number from 0 to 10, or 255, see the documentation)

But where is that documentation?


Change types using this formula T:1,2,3,4,5:t where t is the type (number from 0 to 10, or 255), e.g. T:1:0 for USB-2 A port or T:16:3 for USB-3 A port.

Also, one question is still relevant:

What if we won’t do that? What’s the difference?

Read more comments on GitHub >

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