The CPU clock stops, but RAM powers on and refreshes.
S1 - System is in low-power mode (sleep mode).Each state represents a different level of power, from fully powered up to completely powered down, with partial levels of power in each intermediate state. Newer computers feature Advanced Configuration and Power Interface (ACPI), which extends the APM concept to allow the OS to selectively control power by individual components.ĪCPI supports many power states. This early implementation didn't require an OS that was aware of remote wake-up.ĪPM provided BIOS-based power control. The ability to power on the computer allowed network administrators to complete off-hours maintenance at remote locations without sending a technician. The power control circuitry, in response, activates power resulting in the computer starting the OS. The system could start from a powered off state by sending a Magic Packet*. By toggling a signal connected to the computer power control circuitry, the adapter responds to a Magic Packet that has its own MAC address. The feature has evolved from a simple remote power-on to a complex system able to interact with many devices and operating system (OS) power states.Įarly implementations required the system to have a standby power supply. Struct sockaddr_in* ipaddr = ( struct sockaddr_in*)&ifr.The ability to remotely wake computers is an important development in computer management. Int s = socket (AF_INET, SOCK_DGRAM, 0 ) I have written a simple program that talk to device and and it reported that wake on magic packet is not supported. I am testing it that I can wake my iMac from a MacBook within same subnet but failed.īTW, I found it is most likely that the Wifi card does not support wake on magic packet after some coding and testing.
How to wake up mac remotely Pc#
My Airport Express is currently used for another PC that don't have wifi card to connect wifi network. I am guessing about the IP subnet address ranges, but in general Apple uses 10.0.1.x addresses and 3rd party router vendors use .x addresses, so it is an educated guess.Īlso if you intend to wake your Mac from a remote location while away from home, I think the Sleep Proxy system needs to be the home primary router connected to the internet (do not quote me on this, as I have not played enough with SleepProxy, it is just that I would think the internet connected router would be the one that has to see the incoming request from the internet in order to transfer it to the sleeping Mac inside your home). If one has .x and another has 10.x.x.x, then chances are you have one Mac talking to a subnet on the ISP router and one Mac talking to a subnet on the Airport Express. One way to check would be to see what IP addresses each Mac has. Wake-on-LAN packets DO NOT cross subnet boundaries, neither does Bonjour packets. Have you configured the Airport Express as a bridge or a as a WiFi extender? Otherwise, it is most likely creating a 2nd subnet. You have an Airport Express AND another router? In theory WakeOnLan should have worked, assuming you are on the same subnet So is my iMac physically not possible to wake over Wifi? Is this saying my wifi card does not support wake over wifi?Ĭard Type: AirPort Extreme (0x168C, 0x9A)įirmware Version: Atheros 9380: 4.0.74.0-P2P MDNSResponder: mDNSCoreMachineSleep: m->SleepState 2 (Sleeping) seq 173 MDNSResponder: BeginSleepProcessing: Not registering with Sleep Proxy Server MDNSResponder: BeginSleepProcessing: Did not register with an in-NIC proxy - invoking the callbacks for KA records MDNSResponder: BeginSleepProcessing: en1 not capable of magic packet wakeup MDNSResponder: BeginSleepProcessing: vmnet8 not capable of magic packet wakeup MDNSResponder: BeginSleepProcessing: vmnet1 not capable of magic packet wakeup MDNSResponder: BeginSleepProcessing: utun0 Ignoring for registrations MDNSResponder: Sleeping (old state 0) at 0 MDNSResponder: SystemWakeForNetworkAccess: Wake On LAN: 1 MDNSResponder: SnowLeopardPowerChanged 807007B0 3 0 I tried to troubleshooting it following this page and found out these from log However, when I sleep my iMac, I can no longer see it from my MacBook. While my iMac is on, I can connect to it using Back to My Mac from another MacBook. I have follow the instructions provided in the article but it is not working. I want to setup wake-on-demand as described here so I can remote wake up my iMac and ssh into it while I am oversea.Ĭurrently it is connected to the router with Wifi and I don't have ethernet cable that long enough to connect to the router.