[4.0.17] Any command hanging forever on macOS with chip M1

[niconisoria]

What version of Tailwind CSS are you using?

For example: v4.0.17

What build tool (or framework if it abstracts the build tool) are you using?

https://github.com/rails/tailwindcss-rails

What operating system are you using?

macOS Ventura - Chip M1

Reproduction URL

Creation of a new Rails app that includes TailwindCSS.

rails new test --css=tailwind

Execution of the watch command.

rails tailwindcss:watch

Describe your issue

The terminal hangs after executing the watch command. Same application worked well after downgrading it back to v3.

I believe this is related to the hardware since I saw another user with M1 reporting the same issue here rails/tailwindcss-rails#509 (comment).

[thecrypticace]

I saw your comment in the rails thread and it looks like you have an intel binary being installed on Apple Silicon. While it should run fine through Rosetta it's strange that it's installing the Intel binary. Is your terminal running under Rosetta?

[niconisoria]

@thecrypticace Thank you for checking this issue. I just double checked and followed the steps from the system terminal using Rosetta. Issue still reproduced.

I thought this might be because I was using the VSCode terminal before but the case is the same.

[leoplct]

+1 Having the same problem. The process stalls indefinitely.

Apple M1 (2020) - Sequoia 15.3.2 (24D81)

bundle exec tailwindcss -v

["/Users/me/.rbenv/versions/3.3.1/lib/ruby/gems/3.3.0/gems/tailwindcss-ruby-4.1.3-x86_64-darwin/exe/x86_64-darwin/tailwindcss", "-v"]
============================================================
Bun v1.2.8 (adab0f64) macOS x64
macOS v15.3.2
CPU: sse42 popcnt
Args: 
Features: no_avx2 no_avx 

% which tailwindcss
/Users/me/.rbenv/shims/tailwindcss

% ruby -v
ruby 3.3.1 (2024-04-23 revision c56cd86388) [x86_64-darwin23]

[tvallotton]

Interestingly, calling npx @tailwindcss/cli --version hangs, but calling it without any arguments doesn't.

[JakeSidSmith]

I'm also running into this issue with https://github.com/tailwindlabs/tailwindcss/releases/download/v4.1.3/tailwindcss-macos-x64 (downloaded by mix - phoenix framework project) on an M1 Mac (macOS Sequoia 15.3.2).

Attempted running in terminals with both arm64 and Rosetta, no luck.

I think this might be something to do with the executable not being signed, as if I download and try to run manually I get "Apple could not verify 'tailwindcss-macos-x64' is free of malware". That said, if I get around this (by right clicking and choosing "Open", going into system settings and allowing this to open, and then chmod +x) and then run tailwindcss-macos-x64 --version it still hangs

[mihhail-lapushkin]

In my case, it downloaded the x64 version because I had Intel Erlang. And I got Intel Erlang because I still had Intel Homebrew. 😵

I had to uninstall brew and install it again.

Here's how to check Erlang:

iex -S mix
iex(1)> :erlang.system_info(:system_architecture) 
~c"x86_64-apple-darwin24.2.0"

ARM would print something like: ~c"aarch64-apple-darwin24.2.0"

Here's how to check Homebrew:

brew config
…
HOMEBREW_PREFIX: /usr/local
…

/usr/local means Intel, /opt/homebrew means ARM.