Any Way To Boot a Mac From the Command Line

I don't think so - when it's off, the ethernet hardware is off too. You can wake it from sleep however, using something like Remote Desktop or WakeOnMac.

 

No idea, but Google gave me this:

http://www.coriolis.ch/article18.html

EDIT: Totally didn't read the other posts, and this doesn't turn the Mac on anyway. Its a Monday.

 

Some PCs do have aux power when turned "off" so that wake-on-LAN will still work. Both IBM and Intel have been pushing that idea for years.

 

It's possible but requires a special card, and probably a special BIOS. I would be pretty surprised if the average, off-the-shelf mac could do this.

What's your goal? Are you trying to remote-boot a box after a power failure or something? If not, just keep the machine asleep and use one of the above-mentioned Wake-On-LAN solutions.

 

There is an option to boot a Mac after power failure under the Energy settings pane... but the OP sounds more like he is involved in a geek-off than trying to do something practical.

 

If you're asking about rebooting from command line, the shutdown command will do the trick.

However actually powering on a server remotely requires a lights out manager, which in the case of Apple are only available on XServes:

http://www.apple.com/xserve/management.html

Lights out managers are hardware devices, usually in the form of expansion cards, that have a network interface and are always powered on allowing complete remote management of the server. Desktop machines, whether PC or Mac, don't typically have this capability.

 

The business-class Dell boxes we have at work do indeed leave the ethernet interface active even when powered off. So, the machines can be started by sending a 'magic packet' to the machine's MAC address.

This is not possible on shut-down Macs. However, a 'sleeping' Mac can indeed be woken in the same way.

Having said that, neither the Dells nor Macs can be started with a magic packet (Wake on LAN) is they are connected via wireless. The wireless interface isn't kept active when off or asleep.

 

Duct tape?

Energy saver?