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Dear Aunt TUAW: How do I enable AirDrop on my older Mac?

Dear Aunt TUAW,

I want to use AirDrop between my older iMac and my new MacBook Air. How can I do this? They're both running Lion but AirDrop is only enabled on the MBA.

Your loving nephew,

Fredrik

Dear Fredrik,

You can enable AirDrop for many older Lion systems at the Terminal command line. Enter:

 defaults write com.apple.NetworkBrowser BrowseAllInterfaces 1

After setting the defaults, you'll need to restart Finder:

 killall Finder

Once you do, you should be able to use AirDrop on your local Wi-Fi network. Auntie is currently using AirDrop from her early 2009 Mac mini without any trouble.

Hugs,

Auntie T.

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