open android emulator from terminal mac
Step 1 ( Add Environment Variable )
export ANDROID_HOME=/Users/$(whoami)/Library/Android/sdk
export PATH=$PATH:$ANDROID_HOME/platform-tools
export PATH=$PATH:$ANDROID_HOME/tools
Step 2 ( .bash_profile / .bashrc )
Reload you .bash_profile Or .bashrc depending on OS
Step 3 ( go to emulator directory )
cd /Users/$(whoami)/Library/Android/sdk/emulator
Step 4 ( Get all list of Advs )
emulator -list-avds
Step 5 ( Run your Emulator Command Mode )
emulator -avd Nexus_5_API_22_Android_5.1