Use Emoji Keyboard on MAC OS X

1. On text document, click on where the emoji will appear.

2. Press 'command' + 'control' + 'space bar' key.

3. On 'Characters' palette, click on 'Character Viewer' icon located on the top right.

4. Click on Emoji on left hand panel > Click on desire sub-category > Click on desire emoji

5. To close, click on 'x' located on top left.

URL: https://support.apple.com/en-us/HT201586