Migration Assistant misidentifies Thunderbolt as Ethernet and does not achieve Thunderbolt speeds

Originator:jhawk
Number:rdar://FB9864957 Date Originated:1/29/22, 14:10 EST
Status:Open Resolved:
Product:macOS Product Version:macOS 12.2 (21D49)
Classification:Installation/Setup/Migration/Recovery Reproducible:
 
Migration Assistant misidentifies Thunderbolt as Ethernet and does not achieve Thunderbolt speeds
FB9864957 — macOS

Basic Information

Please provide a descriptive title for your feedback:
Migration Assistant misidentifies Thunderbolt as Ethernet and does not achieve Thunderbolt speeds

Which area are you seeing an issue with?
Installation/Setup/Migration/Recovery

What type of issue are you reporting?
Incorrect/Unexpected Behavior

Details

What does the installation/setup/migration/recovery issue you are seeing involve?
Migration during installation

What build of macOS were you upgrading from?
macOS 12.2 (21D49) 

What were you migrating from?
Another macOS installation

What time was it when this last occurred? (Example: 12:00 pm EST 02/14/2018)
11:02pm EST 1/27/2022 

Description

Please describe the issue and what steps we can take to reproduce it:
Migration Assistant misidentifies Thunderbolt as Ethernet and does not achieve Thunderbolt speeds.

I attempted to migrate data between two A2442 MacBookPro18,4 (14” MacBook Pro 2021) machines both running 12.2.

1. Connect both machines with a brand new Apple Thunderbolt3 0.8m cable.
2. Boot the source machine and run Migration Assistant
3. Boot the destination machine and run Migration Assistant
4. Begin the transfer.

problems:
(a) Migration assistant says “Current connection: Ethernet”. The connection is thunderbolt and there is no ethernet interface or adapter plugged in to either machine. 
(b) The reported connection speeds are low, ranging from 20-40 MB/s. With Thunderbolt, they should be 400 MB/s, that’s 10 to 20 times faster.
(c) MA reports “Connecting a Thunderbolt cable may transfer data faster.” But a Thunderbolt cable is already connected, so it is obviously confused.

See screenshot.

Files
20220128_015644 tb-as-ethernet.jpg



1/29/22, 20:34:11  EST

I attempted to replicate these steps to provide some screenshots, and instead I encountered FB9865600 where Ethernet.

But I was able to obtain screenshots of MA labelling Thunderbolt as both “Ethernet > Unknown” and “Ethernet > Ethernet”, even though there is no Ethernet. Attached here.

20220129_192240 p2p connection details.jpg

Comments


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