Canon will not be producing a driver for Selphy printers. Here is the email I just received from Canon.
Thank you for your inquiry. We value you as a Canon customer and
appreciate the opportunity to assist you. We regret to hear that you
are experiencing difficulty locating Macintosh OS X 10.7 drivers for the
SELPHY CP800.
Unfortunately, Macintosh OS X 10.7 drivers are not planned for your
product. We apologize for the inconvenience this causes you.
While considering the desire to provide the best possible support for
Canon's current products in a timely manner, Canon must make decisions
on which products to support when new operating systems are introduced.
These decisions are generally based on the age of the product and the
number of product estimated to be still in use.
Yet if the decision is made to support a product, the development of new
drivers must be prioritized on basically the same "need" criteria. This
is why some drivers are not available until some time after a new
operating system is introduced.
We understand, and sincerely apologize for the frustration you have
experienced if your product falls into either of these categories (no
driver support or no immediate driver support), but hope that you will
understand our rationale.
We recommend that you transfer pictures to a memory card, insert into
SELPHY CP800 then attempt to print.
I hope this information is helpful to you. Please let us know if we can
be of any further assistance with your SELPHY CP800.
Thank you for choosing Canon.