Enable AirPrint in Mac OS X 10.6.5
For whatever reason, the Mac OS X 10.6.5 update did not include AirPrint shared printing support (meaning you can’t print from an iOS device to a shared Mac printer). But, you can unofficially enable AirPrint by downloading a few AirPrint files from 10.6.5 beta releases and then putting them in the appropriate location on your Mac.
Update: There is now a much easier way to make any printer AirPrint compatible for both Mac OS X and Windows.
This is a pretty straightforward process, but remember you are using software that was pulled from the release of 10.6.5, proceed at your own risk:
Step 1) Make a backup of the following files:
Some users won’t have urftopdf. It’s absolutely crucial that you backup these files, if the beta files cause you problems you need to be able to restore them.
Step 2) Download the AirPrint files, remember these are beta, so use at your own risk.
Step 3) Copy the downloaded beta AirPrint files to these three locations:
Step 4) Restart your Mac
Step 5) Delete and re-add the printer you want to share with iOS devices
Remember, AirPrint is only included in iOS 4.2 so without the update (GM or otherwise), you won’t be able to use AirPrinting.
There’s obviously some reason that Apple opted to remove AirPrint support from Mac OS X 10.6.5, so perhaps it’s still a bit buggy. If you don’t mind taking some chances, this trick from LifeHacker does work.