A connected VNC Viewer user cannot automatically wake a Mac computer from deep sleep.
A VNC Viewer user may be able to wake a Mac computer from display sleep (the lower of the two options in the System Preferences > Energy Saver pane). Consider the following table:
|VNC Enterprise Edition 4.6.x||VNC 5.x|
|OS X 10.6 or earlier||Can wake||Can wake|
|OS X 10.7||4.6.3 required||Can wake|
|OS X 10.7.4||Cannot wake||Can wake|
|OS X 10.8||Cannot wake||5.0.2 required|
|OS X 10.9||Cannot wake||5.0.2 required|
Prior intervention is required before a connected VNC Viewer user can wake a Mac computer from the following deep sleep modes:
- Computer sleep (aka hibernate)
- Hard disk sleep option (default is 10 minutes but can be calibrated using pmset command)
To wake up from deep sleep, you need some external "kick" i.e. "Wake on Ethernet network access" needs to be checked:
- Wake-on-LAN (WOL) magic packet
- Wake-on-demand via Bonjour Sleep Proxy (available with Apple's AirPort Express router products)
To wake up a 10.7 Mac without a display connected, you might need to disable "Lower Power Wake" kernel boot option to ensure the Mac is fully powered up when it receives a WOL packet (see darkwake=0 boot option).