Update 'INSTALL.md'

INSTALL.md

@@ -26,11 +26,12 @@ sudo swapon /swapfile
 sudo apt-get install build-essential pkg-config libc6-dev m4 g++-multilib \
       autoconf libtool ncurses-dev unzip git python zlib1g-dev wget \
       bsdmainutils automake curl unzip nano libsodium-dev
-# pull
+# clone git repo
 git clone https://git.hush.is/hush/hush3
 cd hush3
 # Build
-./build.sh -j$(nproc)
+# This uses 3 build processes, you need 2GB of RAM for each. 
+./build.sh -j3
 ```
 
 ### Building On Ubuntu 16.04 and older systems
@@ -45,6 +46,23 @@ apt-get install -y gcc-7 g++-7 && \
   update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-7 60
 ```
 
+### Build on mac
+
+These instructions are a work in progress. Please report issues to https://hush.is/tg_support
+
+```
+sudo port update
+sudo port upgrade outdated
+sudo port install qt5
+
+# clone git repo
+git clone https://git.hush.is/hush/hush3
+cd hush3
+# Build
+# This uses 3 build processes, you need 2GB of RAM for each. 
+./build.sh -j3
+```
+
 ## Run a HUSH Node
 
 After you have compiled Hush, then you can run it with the following command: