Install x86_64 app on an m1 Mac

[Tarang]

Hi,

I would like to force install an x86 version of a package.

If I do arch -x86_64 brew install ffmpeg I get an error:

Error: Cannot install under Rosetta 2 in ARM default prefix (/opt/homebrew)!
To rerun under ARM use:
    arch -arm64 brew install ...
To install under x86_64, install Homebrew into /usr/local.

I would specifically like x86 version of this package so I don't want the arm version. How can I go about doing this?

[SMillerDev]

Run the brew installer again with Rosetta and use that install to install ffmpeg.

[Tarang]

But then won't that uninstall my m1 version of homebrew?

[SMillerDev]

No, there is a special uninstall script for that.

[Tarang]

I'm quite confused by this, because I installed both, both have installed at /opt/homebrew/bin/brew and if I use the rosetta terminal I am going to get a different outcome to the apple silicon terminal even though the installation is done twice?

Just confirming because it sounds right but it is a bit odd that both are installed in the same place

[gromgit]

I installed both, both have installed at /opt/homebrew/bin/brew

If you used the standard installer, you just installed the M1 Homebrew version twice in the same place.

To install the Intel Homebrew hierarchy, I believe the following should work:

arch -x86_64 /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"

That should tell you that you're installing under /usr/local, not /opt/homebrew.