11-23-2014 09:02 PM
11-25-2014 12:00 AM
Welcome to the Canon Forums and thanks for your inquiry!
The Forums aren't meant for immediate assistance, but are designed to allow the community to help each other with issues encountered or tips they'd like to share along the way.
If this is a time-sensitive matter, our US-based technical support team is a much more efficient way to get help! They're ready to help 24/7 via Email at http://bit.ly/EmailCanon or by phone at 1-800-OK-CANON (1-800-652-2666) weekdays between 10 AM and 10 PM ET (7 AM to 7 PM PT).
We hope this helps!
11-26-2014 04:14 AM
There are not drivers for the PIXMA MP450 that are compatible with the Mac OS X 10.10 (Yosemite) operating system. We ask that you please call or email us using one of the methods on the Contact Us page for other options available to you.