Brucej67 Loc: Cary, NC

For photo printing? Check to see if your printer is on the list http://www.usa.canon.com/internet/portal/us/home/support/self-help-center/Mac-OSX-Compatibility

Bill Munny Loc: Aurora, Colorado

Yes they are on the list. No worries here. So far, all my apps work and in good order.

burkphoto Loc: High Point, NC

Duly noted. My old Epsons work just fine under Sierra.

I've learned over the years that I should always wait to move my main work to the newest OS about a calendar quarter or two after it comes out, usually the second or third point update. That said, the Sierra release is the most stable in years. It also flies...

Brucej67 Loc: Cary, NC

Yes my friend has an Epson printer and does not have problems with it while running Sierra. I believe Canon fell short on this one, I never had problems with them while using El Capitan I did have problems with ColorMunky under El Capitan which cleared up under Sierra.

BassmanBruce Loc: Middle of the Mitten

I have an imac running Sierra 10.12 and a pixma pro 100 and have printed numerous photos with it in the last couple of days. I don't have photo shop or lightroom and processed them in photos.

Peterff Loc: O'er The Hills and Far Away, in Themyscira.

So why blame Canon and not Apple? Something is clearly broken and needs to be fixed, but is there any information that can be reliably used to apportion blame?

Brucej67 Loc: Cary, NC

It has always been the position of third party vendors or hardware merchants to conform to the operating systems and not the responsibility of the OS vendors to conform to third party.

Peterff Loc: O'er The Hills and Far Away, in Themyscira.

Yes, and Canon says they and Apple are working on it. In the mean time, Apple has broken things. I guess using a Mac is a problem. Do those of us that use Windows 10 have a problem? Maybe, maybe not. I haven't noticed one. We'll see what happens I guess.

These things are complicated. They sometimes take time to resolve. At this point, it's bad luck for Apple users, if you have a problem, go complain to Apple. They're the one that did the upgrade. Working with partners is part of the process. Perhaps Sierra just isn't ready yet. It happens. iOS hasn't exactly been perfect either....

Brucej67 Loc: Cary, NC

No in this particular instance Windows does not share the problem, when Apple develops a new operating system it is up to the various software and hardware vendors to test their software and/or hardware on a beta version for compliance. I don't know why Canon did not test their hardware before the release, it is not Apples responsibility, Apple can't be responsible for testing every piece of software and hardware for each operating system they put out, nor do they force the users to upgrade to the new operating system. When I was in software development in the mid 60's we had to write our own IOCS (Input Output Control System) for each piece of hardware attached to (then) a mainframe, today that is all handled for you in the form of drivers (DLL modules).

Peterff Loc: O'er The Hills and Far Away, in Themyscira.

Perhaps we disagree on the liability here. If you have a platform, such Windows or Mac OS, it is your reputation that is on the line and a responsibility to work with major suppliers. It is Sierra and Apple that takes the hit here. Windows works, as does Canon software on Windows. There is a grey area to be navigated, but it is the the Apple Mac upgrade that broke things. Quelle Domage!

BHC Loc: Strawberry Valley, JF, USA

If you mean "quel dommage", it's not as big a shame as Win 95, Win 2000, Win ME and/or Win 8.

Peterff Loc: O'er The Hills and Far Away, in Themyscira.

Perhaps I do, my bad, 'Quelle horreur!' I agree with you about Win 95, Win 2000, Win ME and/or Win 8, just nobody is immune from these things. It affects us all.

BHC Loc: Strawberry Valley, JF, USA

True, and unfortunately, under Tim Cook's leadership, Apple has been under such pressure to push products into the marketplace, a lot of the QC and backchecks of standard programs and peripherals has suffered. While Apple can be forgiven for not insuring upgrade compatibility with minor products, a failure to communicate with such common users such as Adobe, Google, Canon, Epson and even Microsoft (Word and Excel are commonly used on Apple computers, even on Apple campuses) is careless, unprofessional and embarrassing. Additionally, the confusion as to which upgrades are compatible with each model has become increasingly confusing. Forcing hardware upgrades to ensure software usability across entire networks is a stupid trap into which both Apple and Microsoft have fallen, a fate that has caused IBM such grief.

Incidentally, should anyone think I am prejudiced, I have and use a MacBook Pro, an iMac, and an H&P laptop and Dell desktop, both running Windows XP; I haven't upgraded the software because the Windows computers are so old, but I am quite satisfied with their performance..

cjc2 Loc: Hellertown PA

There's four reasons I switched to Apple. Now Apple has become more Microsoft-like in its offerings. Was very happy until Sierra. Now, not so much. What really distressed me was Apple's attitude when discussing the problem. Who is Time Cook and where is Steve Jobs? Turning over in his grave I would think. Sierra is hopefully not a glympse into Apple's IOS future.

cjc2 Loc: Hellertown PA

Thank you. Exactly my point. Far too many new IOS in far to short a time. I agree that it needs to be a two way street; however, ample time between releases should be made available for testing and fixing before it's dumped on us as the next best thing. As was pointed out earlier, the added speed is nice, but at what cost. I'd rather have my system working right than as fast as humanely possible.