As others have said, eBay would be your best bet for locating an Airport card for your iMac because they're no longer in production. (Be aware that you need the original Apple Airport card (802.11b) and not the newer Airport Express card which won't work.) The cards on eBay are used, and fifty bucks seems to be the norm. Also, you don't need the Airport card adapter that comes with some of these cards, so don't pay extra for one of those. And as far as installation, check page 32 of this User Guide.<br><br>Good luck! <br><br><br>Sometimes I get the feeling the whole world is against me, but deep down I know that's not true. Some smaller countries are neutral.<br><br>Robert Orben (1927- )
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Never raise your hand to your children; it leaves your midsection unprotected.<br>~ Robert Orben (1927- )