diff --git a/zsh/aliases.zsh b/zsh/aliases.zsh
index bec7bec..43c7846 100644
--- a/zsh/aliases.zsh
+++ b/zsh/aliases.zsh
@@ -3,6 +3,15 @@
 # Don't change. The following determines where YADR is installed.
 yadr=$HOME/.yadr
 
+# Get operating system
+platform='unknown'
+unamestr=$(uname)
+if [[ $unamestr == 'Linux' ]]; then
+  platform='linux'
+elif [[ $unamestr == 'Darwin' ]]; then
+  platform='darwin'
+fi
+
 # YADR support
 alias yav='yadr vim-add-plugin'
 alias ydv='yadr vim-delete-plugin'
@@ -21,10 +30,16 @@ alias cls='clear;ls'
 
 # Show human friendly numbers and colors
 alias df='df -h'
-alias ll='ls -alGh'
-alias ls='ls -Gh'
 alias du='du -h -d 2'
 
+if [[ $platform == 'linux' ]]; then
+  alias ll='ls -alh --color=auto'
+  alias ls='ls --color=auto'
+elif [[ $platform == 'darwin' ]]; then
+  alias ll='ls -alGh'
+  alias ls='ls -Gh'
+fi
+
 # show me files matching "ls grep"
 alias lsg='ll | grep'