Prentice-Hall International-UK made a mistake in the online offer made to TidBITS readers for my book. They have been offering 20 percent off 18.50 pounds, when in fact the base price they should have been charging was 27.50 pounds, which is now in effect. Sorry for the mistake, and if you lucked out on the lower price, congratulations.
Smarter Parental Controls
If you've been using the parental controls options in Mac OS X to lock your child out of using a particular computer late at night, but would like to employ a more clever technique to limit Internet access, turn to MAC address filtering on an Apple base station.
To do this, launch AirPort Utility, select your base station, and click Manual Setup. In the Access Control view, choose Time Access to turn on MAC filtering. You'll need to enter the MAC address of the particular computer, which (in 10.5 Leopard and 10.6 Snow Leopard) you can find in the Network System Preferences pane: click AirPort in the adapter list, and click Advanced. The AirPort ID is the MAC address.
Published in TidBITS 205.
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