Method #1: Install wakeonlan using Homebrew

Open the Terminal app and type the following command:

brew install wakeonlan

Sample outputs:

Method #2: Download and install wakeonlan Perl script

Open a terminal and type the following curl command:
$ mkdir -p $HOME/bin
$ curl https://raw.githubusercontent.com/jpoliv/wakeonlan/master/wakeonlan -o ~/bin/wakeonlan
$ chmod +x ~/bin/wakeonlan

How do I send WOL on a OS X?

The syntax is:
$ ~/bin/wakeonlan server-mac-address-here
For example, if nas01 server has 00:08:9b:c4:30:30 mac address, enter:
$ ~/bin/wakeonlan 00:08:9b:c4:30:30
Sample outputs:
Sending magic packet to 255.255.255.255:9 with 00:08:9b:c4:30:30

Other options

    -i ip_address
        set the destination IP address
        default: 255.255.255.255 (the limited broadcast address)
    -p port
        set the destination port
        default: 9 (the discard port)
    -f file 
        uses file as a source of hardware addresses

Apple computer wake for network access (WOL) setting

If you want other users to be able to access your Apple OS X based computer’s shared resources, such as shared printers/files/folders or iTunes playlists, even when your computer is in sleep mode. Open System Preferences > choose “Energy Saver preferences“. This set options that control your computer’s energy use including WOL for all Mac Based server and client systems:

Make sure you select the option “Wake for network access” so that other users can wake up your computer using WOL magic packet.

References

• See wakeonlan command man page for more information.
• Download Wakeonlan: Perl script for waking up computers via Wake-On-LAN magic packets
• HowTo: Wake Up Computers Using Linux Command [ Wake-on-LAN ( WOL ) ]