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▲macOS 27: ifconfig command no longer prints hardware MAC address

4 points by luckman212 1 days ago | 8 comments

luckman212 32 minutes ago [-]

I filed a bashbug: https://savannah.gnu.org/bugs/index.php?68722

luckman212 2 hours ago [-]

27.0.1 did not fix it, and I reproduced it on 2 more Macs, one was literally factory reset, just installed a fresh macOS 27, installed Homebrew, installed Bash5, ran ifconfig .... bug reproduced

luckman212 2 hours ago [-]

Interestingly, running `ifconfig` from a Zsh shell still does show MAC addresses

5 hours ago [-]

ButlerianJihad 30 minutes ago [-]

ifconfig is deprecated in modern Linux. Is it not deprecated in BSD? Does Apple not provide the ip(8) command-line tools?

https://manpages.ubuntu.com/manpages/stonking/man8/ip.8.html

No, it seems that iproute2 is Linux-first, or Linux-only: https://en.wikipedia.org/wiki/Iproute2

Sad!

lapcat 1 days ago [-]

I can't reproduce this.

luckman212 17 hours ago [-]

It seems to only affect Bash 5.3.20 (Homebrew) - very odd:

    % /bin/bash --version
    GNU bash, version 3.2.57(1)-release (arm64-apple-darwin26)
    
    % /opt/homebrew/bin/bash --version
    GNU bash, version 5.3.20(1)-release (aarch64-apple-darwin27.0.0)
    
    % zsh -c '/sbin/ifconfig en0 | grep ether'
    ether d0:11:e5:1a:27:7a
    
    % /bin/bash -c '/sbin/ifconfig en0 | grep ether'
    ether d0:11:e5:1a:27:7a
    
    % /opt/homebrew/bin/bash -c '/sbin/ifconfig en0 | grep ether'
    ether 02:00:00:00:00:00

hrbrmstr 15 hours ago [-]

it works fine in system bash for me

luckman212 8 hours ago [-]

Yes it works in my system bash too (see above) - seems to be some sort of obscure Bash bug...

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