![]() There are even websites that will do this for you, such as. The next step (of course) is to wake up a computer over the Internet to gain access to files or computing power at home. Macs don't do this, they'll only wake up from sleep. Note that the original purpose for this mechanism was to start up a computer that was turned off. There are also tons of perl and python scripts that will do the same. On most Macs, if you go into the System Preferences and select the Energy Saver, under Options there is a checkbox for "Wake for Ethernet network administrator access." That network administrator could be you! Enabling this option means the computer enables the ability known elsewhere in the industry as "wake on LAN." The Ethernet adapter will now stay powered up and wake up the rest of the computer when it sees a "magic" packet.Īpple's Remote Desktop will send those packets, but you can also download a free utility like WakeOnLan. As luck would have it, there's an easier way to do it-if your computer is connected to your local network through wired Ethernet, that is. However, sometimes it's annoying to have to walk over and turn on or wake up that computer when you need it. This is especially true for a secondary computer that you don't use all the time. But that's just a guess.Some people let their computers run 24/7, but you can save some money on electricity by turning your Mac off or putting it to sleep when you don't use it. So while industry-wide Wake-on-LAN is a network device feature based on a magic packet (that requires no OS interaction), Mac's magic "wake-on-LAN and also still respond to pings" is because they haven't actually put the whole OS to sleep and/or have a separate network stack still running in sleep mode. My assumption is this is because Apple controls the hardware and software stack. And after I've logged out, 15 minutes later it will go to sleep again. ![]() This 2nd property ends up being really nice: it automatically goes to sleep and saves power when not in use and doesn't require any extra thought to power on when I want to ssh into it. It will wake up automatically upon incoming ssh connection, no Wake-on-LAN required. It still responds to ping on the network. I have noticed that it goes to sleep and has two distinct properties separate from any Linux machine I have while asleep: ![]() I have been using Wake-on-LAN successfully for many years now for a number of my Linux devices. ![]()
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December 2022
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