andrewpauling / install_mo_pack_applesilicon

Instructions to install the mo_pack package on a Mac with Apple Silicon

Install mo_pack for Apple Silicon

The package mo_pack, needed so that the iris package can unpack the Met Office binary format files, does not currently have a build in conda for arm64. But, we can compile and install our own.

To install, we need to first build and install the package libmo_unpack, more information here.

• You will need to install the XCode Command Line Tools:

xcode-select install

• You will need CMake. I got this using Homebrew. Follow the instructions to install homebrew then run:

brew install cmake
brew install check

• Download and put the script build_libmo_unpack.sh where you want to download the code
• Run the script by doing ./build_libmo_unpack.sh
• At the end of this script you will be asked for your sudo password, it will then install the library and tell you where it put it. For me this was in /usr/local/lib and usr/local/include
• Next download the mo_pack source code:

git clone https://github.com/SciTools/mo_pack

• cd into mo_pack, activate the conda environment you want to install it in and then run:

python setup.py build_ext -I/usr/local/include -L/usr/local/lib -R/usr/local/lib
pip install -e .

You should be good to go!