Merge pull request #3283 from CatFish47/update-install

Updated INSTALL.md with apple silicon messages

INSTALL.md

@@ -101,7 +101,7 @@ sudo service postgresql start
 ```
 ### PostgreSQL installation on Mac OS X
 
-For Mac OS X, you can either install postgres through the [Postgres.app](https://postgresapp.com/downloads.html). These instructions were tested with the Postgres.app v9.5, v13.
+For Mac OS X, it is strongly encourage to install Postgres through the [Postgres.app](https://postgresapp.com/downloads.html). We recommend using Postgres.app versions 9.5 or 13, as instructions were tested most extensively with these versions.
 
 You'll then need to ensure that the postgres binaries (for example, ``psql``) are in your executable search path (``$PATH`` environment variable). If you are using Postgres.app on OS X, you can do this by running the following, though you may have to replace`~/.bash_profile`with `~/.zshrc` if you're using zshell rather than the built-in bash, and you may have to change the version number `Versions/9.3/` to the exact one that you are installing:
 
@@ -334,7 +334,11 @@ sudo apt-get install postgresql-contrib
 # or: sudo apt-get install postgresql-contrib-9.3 depending on your OS and apt repository versions
 ```
 
+### Apple Silicon Mac (M1/M2)
 
+#### `no such file or directory` or `fatal error: file not found`
+
+M1 and M2 macs have a new feature where homebrew is not installed to the path `usr/local/bin` like Intel Macs are, but to `opt/homebrew/bin`. This is because of reasons including security concerns with the old path, potential conflicts with installing to `/usr/local/bin`, and the fact that other package managers have been using `/opt/<manager_name>` for a while now. To fix this, ensure that homebrew libraries are being searched for in the `opt/homebrew/lib` path.
 
 ## General Troubleshooting