Solution
Applicable models:
MP250 series, MP270 series, MP490 series, MP550 series, MP560 series, MP640 series, MP990 series
When upgrading the OS from Mac OS X v10.5.x to Mac OS X v10.6 (Snow Leopard), due to the OS specifications, the printer driver is deleted.
Download the printer driver supporting Mac OS X v10.6 and install it.
However, the printer driver supporting Mac OS X v10.6 is being prepared.
Please wait for our software release information. Thank you for your patience.