Homebrew installation on ARM MacBook with macOS 11.0

[ivo-1]

Apologies in advance for this noob question, but I can't figure out how to install homebrew on my device. I ran the following script:

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

I get the following error message:
Homebrew is not (yet) supported on ARM processors! Rerun the Homebrew installer under Rosetta 2.

I want to rerun the installer under Rosetta 2, however, I can't figure out how to do that (how can I start my bash under Rosetta 2?). Would greatly appreciate any help!

[audriusl]

Someone made guide for that, but I am still could not start react project, getting memory error.

https://github.com/mikelxc/Workarounds-for-ARM-mac

[SMillerDev]

And you'll get a lot such errors. Actually installing with Rosetta enabled it the better choice, that is why Homebrew is recommending it.

[jluckyiv]

This post on Sam Soffes's blog has a nice walkthrough on installing Homebrew both natively on M1 and under Rosetta 2. (I have no personal experience. I'm researching how this would work before I buy.)

tldr

• prefix commands with arch -x86_64 to install and run Homebrew under Rosetta 2
• install ARM-native Homebrew in /opt/homebrew and add it to your path
• alias ibrew='arch -x86_64 /usr/local/bin/brew' to run

Per the post:

Now you can easily run brew to get the native one or ibrew to get the Rosetta one. You could of course do this in the other order in your $PATH if you prefer and something like abrew (for Apple Silicon Homebrew) or whatever else.

If you install things in both Homebrews, the one that is first in your path will be used.

[ecomba]

Alternatively you could tell your terminal app to open using Rosetta.

[troywarr]

@ecomba Thank you! This seems like a much easier temporary solution in the meantime until the team comes up with an official recommendation via Homebrew/brew#9177

[SMillerDev]

This is also the recommended approach when you run the installer.

[tyron]

Should you use Rosetta2 every time you want to install a package with brew? Or you just need to run it for the installation?

[jluckyiv]

@tyron I think it depends on the method you use. If you use the method @ecomba recommends, running Terminal (or iTerm2) in Rosetta 2, then every command you run from the command line will run in Rosetta 2 automatically. This article from OSXDaily explains how you can have a Rosetta 2 Terminal and a native M1 Terminal on the same machine.

If you use the solution I posted, then you'll have two parallel homebrew environments in the same shell. If you install a package with ibrew, that package won't be available with brew (and vice versa).

[AddoSolutions]

At the risk of sounding redundant, is there an official threat or issue out there for this that I can either subscribe to and/or help with? Would love to bypass all the general talk and get right to business on the actual technical needs to make this happen.

Thanks!

[SMillerDev]

Homebrew/brew#7857

[johnkaplantech]

As of now, if you install Rosetta2 on Big Sur, you can have it turn on in your terminal by default by going to the application folder, two-finger/right click your terminal program, and selecting "Get Info." In the middle of the info dialog there's checkboxes, one of which is "Open using Rosetta." Check that, restart your terminal, and the curl command at the start of this thread will work, and get you a brew. I successfully installed node and npm after that with brew, and they're working fine.

[gromgit]

restart your terminal

This seems to be the part that's forgotten by pretty much everyone who's having trouble getting Rosetta to work for them.

[irshadiqbal]

Thank you so much @johnkaplantech. This is the way to go. I installed it exactly the same way. i.e. followed instruction given by you to enable Rosetta for terminal in Application/Utilities folder. Then ran the following command:
/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install.sh)"

[Glebmaksimov]

Hello guys, someone installed opencv C++ on mac m1?