I just started my journey in development for StarkNet. It is very exciting, but also immediately painful. It’s new tech, so it’s still all half broken.

Specifically, I am trying to install cairo-lang on my new MacBook Pro with M1 chip and macOS Big 12.1 Monterey. But I get errors installing the package. 
It’s mainly due to the default Python version not matching (3.9 instead of 3.7), which causes a cascade of issues which includes pip and gmp not found.

Here I found a series of advices. The main one tried to make me install an x86 version of brew running on Rosetta, but I don’t want to install two versions of brew on my machine.

The second advice has worked well for me. Here is exactly what I did.

Installation steps

# Install brew if you didn't it already
/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"

# Install python
brew install python 

# Then a dependency
brew install gmp

# Some more dependencies, but properly linking gmp (this is the fix)
CFLAGS=-I`brew --prefix gmp`/include LDFLAGS=-L`brew --prefix gmp`/lib pip3 install ecdsa fastecdsa sympy

# And finally, install cairo-lang
pip3 install cairo-lang

You should be ready to go! Otherwise try some other solutions from here.

Now start BUIDLing

Compile your first contract following the official instructions!