Fixing README.md for mac users and the git clone

On mac your libraries are dylib instead of .so files, there are some
missing sdl2 dependencies. To checkout the git archives, you need to
clone them.

Author: 0x6e3078

README.md

@@ -10,23 +10,12 @@ This is the [Neotron](https://github.com/neotron-compute) BIOS that lets you run
 
 This BIOS uses [pix-engine](https://crates.io/crates/pix-engine), so should run on any platform that pix-engine supports.
 
-If you have a Mac, run:
-
-```console
-brew install sdl2
-brew install sdl2_mixer
-brew install sdl2_image
-export LIBRARY_PATH="$LIBRARY_PATH:$(brew --prefix)/lib" 
-```
-
-You will need to re-run the `export` command before you re-build the application.
-
 ## Building on Linux
 
 Build and run this BIOS (and use it to boot Neotron OS) with...
 
 ```console
-~ $ git checkout https://github.com/neotron-compute/Neotron-Desktop-BIOS.git
+~ $ git clone https://github.com/Neotron-Compute/Neotron-Desktop-BIOS.git
 ~ $ cd Neotron-Desktop-BIOS
 ~/Neotron-Desktop-BIOS $ gunzip -c disk.img.gz > disk.img
 ~/Neotron-Desktop-BIOS $ RUST_LOG=debug cargo run -- --nvram=./nvram.dat --os=./libneotron_os.so --disk=./disk.img
@@ -37,14 +26,51 @@ In the OS run the `shutdown` command to quit.
 The file `libneotron_os.so` is not supplied. You can build it with:
 
 ```console
-~ $ git checkout https://github.com/neotron-compute/neotron-os.git
+~ $ git clone https://github.com/neotron-compute/neotron-os.git
 ~ $ cd neotron-os
 ~/neotron-os $ cargo build --release --lib
 ~/neotron-os $ ls ./target/release/*.so
 ./target/release/libneotron_os.so
 ~/neotron-os $ cp ./target/release/libneotron_os.so ~/Neotron-Desktop-BIOS
 ```
 
+## Building on MacOS
+
+Install dependencies first:
+
+```console
+brew install sdl2
+brew install sdl2_ttf
+brew install sdl2_gfx
+brew install sdl2_mixer
+brew install sdl2_image
+export LIBRARY_PATH="$LIBRARY_PATH:$(brew --prefix)/lib"
+```
+
+You will need to re-run the `export` command before you re-build the application.
+
+
+The file `libneotron_os.dylib` is not supplied. Build it first with:
+
+```console
+~ $ mkdir Neotron
+~ $ cd Neotron
+~/Neotron $ git clone https://github.com/neotron-compute/neotron-os.git
+~/Neotron $ cd neotron-os
+~/Neotron/neotron-os $ cargo build --release --lib
+~/Neotron/neotron-os $ ls ./target/release/*.so
+./target/release/libneotron_os.dylib
+```
+
+```console
+~ $ cd ~/Neotron
+~/Neotron $ git clone https://github.com/Neotron-Compute/Neotron-Desktop-BIOS.git
+~/Neotron $ cd Neotron-Desktop-BIOS
+~/Neotron/Neotron-Desktop-BIOS $ gunzip -c disk.img.gz > disk.img
+~/Neotron/Neotron-Desktop-BIOS $ cp ~/Neotron/neotron-os/target/release/libneotron_os.dylib ./
+~/Neotron/Neotron-Desktop-BIOS $ RUST_LOG=debug cargo run -- --nvram=./nvram.dat --os=./libneotron_os.dylib --disk=./disk.img
+```
+
 ## Building on Windows
 
 1. Install and bootstrap [vcpkg](https://github.com/microsoft/vcpkg)
@@ -75,7 +101,7 @@ The file `libneotron_os.so` is not supplied. You can build it with:
    The file `neotron_os.dll` is not supplied. You can build it with:
 
    ```console
-   C:\Users\user\Documents> git checkout https://github.com/neotron-compute/neotron-os.git
+   C:\Users\user\Documents> git clone https://github.com/neotron-compute/neotron-os.git
    C:\Users\user\Documents> cd neotron-os
    C:\Users\user\Documents\neotron-os> cargo build --release --lib
    C:\Users\user\Documents\neotron-os> copy .\target\release\neotron_os.dll ..\Neotron-Desktop-BIOS