my Canon PIXMA MP 450
- Thread starter Veenao
- Start date
- Joined
- Jan 23, 2008
- Messages
- 65,248
- Reaction score
- 1,833
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- Location
- Keller, Texas
- Your Mac's Specs
- 2017 27" iMac, 10.5" iPad Pro, iPhone 8, iPhone 11, iPhone 12 Mini, Numerous iPods, Monterey
By restoring the previous version of OS X from your backup would be the easiest way. No backup? You haven't told us anything about your Mac and which version of OS X it was running before you updated to Yosemite.
Before giving up on Yosemite, have you tried to find out if Canon had an updated driver for your printer?
- Joined
- Jan 20, 2012
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- 5,068
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- 431
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- 83
- Location
- North Carolina
- Your Mac's Specs
- Air M2 ('22) OS 14.3; M3 iMac ('23) OS 14.3; iPad Pro; iPhone 14
Hello and welcome to the forum!
Why is your printer not working w/ Yosemite? Have you gone to the Canon website to see if a firmware upgrade is needed or if the appropriate drivers are installed? From a 2006 review HERE, your printer is 'ancient' (electronics are like 'dog years') - so, please provide further information on your computer (model/year) and whether w/ your upgrade to Yosemite is working well - if you cannot resolve the issue w/ my initial suggestions, then a new printer is certainly a consideration - let us know your thoughts? Dave 
- Joined
- Oct 16, 2010
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- Location
- Brentwood Bay, BC, Canada
- Your Mac's Specs
- 2011 27" iMac, 1TB(partitioned) SSD, 20GB, OS X 10.11.6 El Capitan
Have you tried a google search, for example:
https://www.google.ca/search?client...&oe=UTF-8&gfe_rd=cr&ei=9WSDVYr3H-bs8wfjyIGwAQ
And some hits might help like this:
How-to Get & Install Canon MP450 Printer Driver and QuickStart Scanning on Mac OS X 10.10 Yosemite Easy Guide | Mac Tutorials
or some of the other hits.
https://www.google.ca/search?client...&oe=UTF-8&gfe_rd=cr&ei=9WSDVYr3H-bs8wfjyIGwAQ
And some hits might help like this:
How-to Get & Install Canon MP450 Printer Driver and QuickStart Scanning on Mac OS X 10.10 Yosemite Easy Guide | Mac Tutorials
or some of the other hits.
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