Add instructions for M1 users

README.md

@@ -69,6 +69,8 @@ Common issues tend to be related to Python not finding Julia.
 To debug this, try running `python -c 'import os; print(os.environ["PATH"])'`.
 If none of these folders contain your Julia binary, then you need to add Julia's `bin` folder to your `PATH` environment variable.
 
+**Running PySR on macOS with an M1 processor:** you should use the pip version, and make sure to get the Julia binary for M1 processors. You might have to scroll down to [upcoming releases](https://julialang.org/downloads/#upcoming_release).
+
 # Introduction
 
 Let's create a PySR example. First, let's import