diff --git a/README.md b/README.md
index fa0e642..05768dc 100644
--- a/README.md
+++ b/README.md
@@ -22,23 +22,23 @@ run this once in a empty directory.
 ```sh
 git clone ssh://git@gitlab.repo.digitech.hs-emden-leer.de:2222/link/projekte/ws19/vkvm-new/installation.git
 cd installation
-./install.sh
+install.sh
 ```
 
 **update all subprojects**
 
 ```sh
-./update.sh
+update.sh
 ```
 
 **checkout development versions**
 
 ```sh
-./checkout-dev.sh
+checkout-dev.sh
 ```
 
 **build all projects**
 
 ```sh
-./build.sh
+build.sh
 ```
\ No newline at end of file
diff --git a/install.sh b/install.sh
index 42dc192..5353041 100755
--- a/install.sh
+++ b/install.sh
@@ -1,5 +1,7 @@
 #!/usr/bin/env bash
 
+development = false
+
 install_packages() {
   if [[ -f /usr/bin/pacman ]]; then
     sudo pacman -S clang make cmake fltk catch2
@@ -14,38 +16,65 @@ install_packages() {
     cd ..
 
   elif [[ -f /usr/local/Homebrew ]]; then
-    sudo brew install llvm clang make cmake clang-format fltk catch2
-    
+    sudo brew install clang make cmake fltk catch2
+
+    #some systems have --with-toolchain some dont, so we need to do this
+    if ! sudo brew install llvm --with-toolchain; then
+      sudo brew install llvm
+    elif
+
+    ln -s "/usr/local/opt/llvm/bin/clang-tidy" "/usr/local/bin/clang-tidy"
   fi
 }
 
+while [ -n "$1" ]; do
+ 
+    case "$1" in
+ 
+    -dev) development = true ;;
+ 
+    *) echo "Option $1 not recognized" ;;
+ 
+    esac
+ 
+    shift
+ 
+done
 
 install_packages
 
 echo "cloning repositories"
 cd ..
 
-git clone ssh://git@gitlab.repo.digitech.hs-emden-leer.de:2222/link/projekte/ws19/vkvm-new/library.git
+if [ $development ]; then
+  git clone ssh://git@gitlab.repo.digitech.hs-emden-leer.de:2222/link/projekte/ws19/vkvm-new/library.git
+  git clone ssh://git@gitlab.repo.digitech.hs-emden-leer.de:2222/link/projekte/ws19/vkvm-new/shared-memory.git
+  git clone ssh://git@gitlab.repo.digitech.hs-emden-leer.de:2222/link/projekte/ws19/vkvm-new/text-renderer.git
+  git clone ssh://git@gitlab.repo.digitech.hs-emden-leer.de:2222/link/projekte/ws19/vkvm-new/gui.git
+  git clone ssh://git@gitlab.repo.digitech.hs-emden-leer.de:2222/link/projekte/ws19/vkvm-new/terminal.git
+  git clone ssh://git@gitlab.repo.digitech.hs-emden-leer.de:2222/link/projekte/ws19/vkvm-new/simple-draw.git
+  git clone ssh://git@gitlab.repo.digitech.hs-emden-leer.de:2222/link/projekte/ws19/vkvm-new/demo.git
+elif
+  git clone https://gitlab.repo.digitech.hs-emden-leer.de/link/projekte/ws19/vkvm-new/library.git
+  git clone https://gitlab.repo.digitech.hs-emden-leer.de/link/projekte/ws19/vkvm-new/shared-memory.git
+  git clone https://gitlab.repo.digitech.hs-emden-leer.de/link/projekte/ws19/vkvm-new/text-renderer.git
+  git clone https://gitlab.repo.digitech.hs-emden-leer.de/link/projekte/ws19/vkvm-new/gui.git
+  git clone https://gitlab.repo.digitech.hs-emden-leer.de/link/projekte/ws19/vkvm-new/terminal.git
+  git clone https://gitlab.repo.digitech.hs-emden-leer.de/link/projekte/ws19/vkvm-new/simple-draw.git
+  git clone https://gitlab.repo.digitech.hs-emden-leer.de/link/projekte/ws19/vkvm-new/demo.git
+fi
+
 mkdir library/build
-
-git clone ssh://git@gitlab.repo.digitech.hs-emden-leer.de:2222/link/projekte/ws19/vkvm-new/shared-memory.git
 mkdir shared-memory/build
-
-git clone ssh://git@gitlab.repo.digitech.hs-emden-leer.de:2222/link/projekte/ws19/vkvm-new/text-renderer.git
 mkdir text-renderer/build
-
-git clone ssh://git@gitlab.repo.digitech.hs-emden-leer.de:2222/link/projekte/ws19/vkvm-new/gui.git
 mkdir gui/build
-
-git clone ssh://git@gitlab.repo.digitech.hs-emden-leer.de:2222/link/projekte/ws19/vkvm-new/terminal.git
 mkdir terminal/build
-
-git clone ssh://git@gitlab.repo.digitech.hs-emden-leer.de:2222/link/projekte/ws19/vkvm-new/simple-draw.git
 mkdir simple-draw/build
-
-git clone ssh://git@gitlab.repo.digitech.hs-emden-leer.de:2222/link/projekte/ws19/vkvm-new/demo.git
 mkdir demo/build
 
+
+
+
 cd installation
 
 echo "installation completed"