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N-Up Printing from iOS using Printopia iOS devices
Printopia is a great tool for exposing non-Air Print printers on a local network so that you can print to them from any iOS device. But even better is that it can expose PDF Workflow to do your bidding. In my case, I wanted to do n-up printing (n pages per sheet).

To do this, open up Automator and create a Print Plugin. For the workflow, you only need to add a single Run Shell Script action with the following line:
lp -d <printer> -o number-up=2 -o media=Letter "&#36;*"
The details of the command will vary depending on your needs. In my case, I wanted 2-up printing to go do my default printer, so I could exclude the -d option.

To see a list of available print queues, type lpstat -a in terminal.

Once you save your Print Plugin, go to the Printopia in System Preferences and add your new plugin as an available destination for printing.

[crarko adds: I admit to being a happy Printopia user, and know there are others around here as well. While not needing this particular item myself, it does suggest some other things to try. Which is why I think it's a useful hint.]
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Another Printer-to-AirPrint Software
Authored by: aMacUzur on Feb 07, '14 06:59:08PM

handyPrint ( is another (donation-ware) option to enable "regular" printers to be accessible via AirPrint.

I'm not associated with handyPrint developers but have been using handyPrint for quite a while, after trying other options that didn't work well.

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Another Printer-to-AirPrint Software
Authored by: keirthomas on Feb 09, '14 03:34:25AM

I might be wrong but handyPrint isn't donationware any longer. It's now a time-limited demo.

I know because I feature it in my latest book (iPad and iPhone Kung Fu). When I started writing it was donationware. By the time I'd finished it had become shareware.

I'm a little surprised that OS X CUPS can't be hacked to allow AirPrinting, bearing in mind that you can do just that on Ubuntu, which also relies on CUPS.

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N-Up Printing from iOS using Printopia
Authored by: stevebr on Feb 09, '14 02:14:40PM

Another general non-AirPrint option is the Printer Simulator bundled with Xcode, which saves PDFs of the "printed" documents to a folder of your choice on your Mac (choose in the Simulator's preferences). The simulated printers appear to iOS devices on the same network. You can print the PDFs manually on the Mac or set up a folder action to print them as they are created in the folder. Presumably you could attach the workflow suggested in this hint to the folder action, but I haven't tried.

Launch Xcode and go to the Xcode menu > Open Developer Tool > Printer Simulater. Xcode can be closed at that point, but the Simulator needs to be kept running. Add it to your dock for easier access.

Obviously not an ideal solution, but it works.

Edited on Feb 09, '14 02:23:03PM by stevebr

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