Summary: I liked this printer at first and actually bought two of them, both an ES30 and ES40. However, since upgrading my Mac to Mountain Lion some six months ago, they have been unusable. When one tries to download a driver at the Canon web site, one gets a message, "Content for OS X v10.8 Mountain Lion will be available soon. In the meantime, please use OS X v10.7 Lion content as a possible alternative." This message has been in place for approximately six months.
Summary: If you plan on hooking this up to your updated Mac with the more recent Lion operating system, you will be out of luck. It won't work. [...] I used my two Selphys on an older iBook for photo booth gigs in the past. But my iBook crashed recently so I got a used MacBook with the Lion OS installed. Only to find out it won't work because Canon does not plan to update several of the Selphy printer drivers.