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Use trackpad tap-to-click on login window and by default
Authored by: SirPavlova on Sep 19, '11 02:39:55AM

I think it's probably because you're on a newer Mac than Rob wasódoes yours have a multitouch trackpad?

For old trackpads (tested on Snow Leopard):

sudo defaults write -g -int 1

For multitouch trackpads (tested on Snow Leopard & Lion):

sudo defaults write Clicking -int 1

You don't need to explicitly address the plist files if you use sudo. The defaults system looks in ~/Library/Preferences, /Library/Preferences, & /System/Library/Preferences in that order, stopping early when the preference is found. When writing a preference, it always puts the preference in ~/Library/Preferences. root's ~ is /private/var/root, so defaults under sudo writes to /private/var/root/Library/Preferences. And finally, the login screen runs as root, so when it starts up & looks for the preference, it looks in root's ~/Library/Preferences first.

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