macOS – Wake Up Servers Using Wake-on-LAN ( WOL ) Command Utility

macOS – Wake Up servers and computers using Perl script

We need to install wakeonlan Perl script.

Method #1: Install wakeonlan using Homebrew

First, install Homebrew on macOS. For instance:
curl -O https://raw.githubusercontent.com/Homebrew/install/master/install.sh
bash install.sh
Open the Terminal app and then type the following command to install wakeonlan client on your Mac:

brew install wakeonlan

Sample outputs:

Fig.01: OS X brew install wakeonlan client

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 macOS or 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:

Fig.01: OS X setting WOL

Summing up

We can send ‘magic packets’ to wake-on-lan enabled ethernet adapters, in order to switch on the called PC or server. We can also wake up sleeping Mac mini or MacBook pro for backups and any other reasons.

• 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 ) ]