diff --git a/README.md b/README.md
index 9233b32..4664614 100644
--- a/README.md
+++ b/README.md
@@ -134,9 +134,11 @@ nvim-base16 doesnt even take time to load unlike base16-vim which was eating hal
 
 - Install packer.nvim
 
-```shell
+```
+
 git clone https://github.com/wbthomason/packer.nvim\
  ~/.local/share/nvim/site/pack/packer/start/packer.nvim
+ 
 ```
 
 - copy lua folder and init.lua into ~/.config/nvim
diff --git a/install.sh b/install.sh
index 2249fc9..a0295e1 100755
--- a/install.sh
+++ b/install.sh
@@ -53,7 +53,12 @@ cp -r init.lua ~/.config/nvim && cp -r lua ~/.config/nvim
 read -p "which shell do you use?: " shellname
 echo "$shellname"
 
-sed -i "s/bash/$shellname/g" ~/.config/nvim/lua/mappings/lua.lua
+if [ "$(get_platform)" = "Mac" ]; then
+    gsed -i "s/bash/$shellname/g" ~/.config/nvim/lua/mappings/lua.lua
+else
+    sed -i "s/bash/$shellname/g" ~/.config/nvim/lua/mappings/lua.lua
+fi
+
 echo "shell changed to $shellname on nvim successfully!"
 
 #for f in `find -E . -regex ".*\.vim$|.*\.lua$"`; do