Then it’s a trial and error, hit or miss proposition. If you can afford a new printer, there are plenty that print whatever the iPhone and iPad throw at it. If you have a household or small office with two or three printers, especially a few older ones, you need Printopia, the print-it-and-forget-it app for the Mac.
What Printopia does is pretty much setup any printer you have connected to your Mac into a printer easily accessible by your iPhone or iPad. Grab your iDevice (no, not that one; the one from Apple), select what you want to print, and the printer shows up ready to select, thanks to Printopia.
Set it up in your Mac’s System Preferences.
That gives you wireless printing from iPhone or iPad to your printer– even one connected to your Airport device, or Time Capsule.
Printopia can even setup password protection so your neighbors don’t use up all your ink (good for the office or classroom, too).
All that sounds well and good but plenty of printers today work with iPhones and iPads, right? Printopia has a few other useful functions including sending a file to Dropbox or Evernote. Cool, no?
You won’t even need to add anything to your iPhone or iPad. Printing just works– even on older Macs going back to Leopard and PowerPCs. This is well done, very useful, and the only complaint is the price.