Updated mac build/installation guide

AppleM1_Guide.md

@@ -1,5 +1,7 @@
 - Install homebrew: https://brew.sh/
 - Set up required development environment
+  - Install command line tools for XCode
+  - Install build dependencies by running these commands in a terminal
   ```
           brew install gsl
           brew install hdf5
@@ -8,3 +10,18 @@
           brew install doxygen
   ```
 
+- Install anaconda/miniconda/micromamba/miniforge. For example, for micromamba, run
+```
+"${SHELL}" <(curl -L micro.mamba.pm/install.sh)
+```
+
+  in command line
+- Update micromamba: `micromamba self-update`
+- Restart terminal and create an environment with necessary packages: 
+
+```
+micromamba create -n moose hdf5 graphviz pytables numpy matplotlib vpython lxml doxygen setuptools wheel pybind11[global]
+```
+- Activate the moose environment: `micromamba activate moose`
+- Install libsbml: `pip install python-libsbml`
+- Install moose from github: `pip install git+https://github.com/BhallaLab/moose-core.git`