Adam Pash, formerly of Lifehacker, recently switched from iPhone to Android, but his phone number is still tied to iMessage, preventing him from receiving SMS text messages on his new phone from iMessage users. According to Pash, Apple support informed him that engineers are working on a fix for the problem, but don’t currently have a reliable solution.follow link
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.
The iMessage Trap