Broadcast - yeah, that's always the tricky bit, esp when I don't mention it :whistling: .

Windows version (I've never used it, but I expect it works) - it's on the Wiki, see 'Synergy with broadcast'

Mac/*nix version - I've added the like to the wiki just now too to the version I used - see Synergy with broadcast OSX - command line

The key for the mac version to toggle broadcasting is: `
I'm guessing it's the same one on the PC.