Hey,
thanks for your answer, it's highly appreciated (you are a legend since the early days ) , and sorry for hijacking the thread –but one of the problems is that there is no other forum space (other than redshift specific) where this can be communicated. And there are things that a bug report / support ticketing system simply doesn't catch. Your C4D doesn't crash, there is no way of knowing what exactly has happened to your thumbnails, and so no bug report ever gets to the devs – just remember, this affects every mac that has been updated to Sequoia, and Sequoia has been out since mid september last year, making it 7 months if I'm counting it right. And like the article rightfully mentions, it means also 7 months of paid subscription. I'm usually the one who answers any C4D criticism with "it has to get worse before it gets better", and most of the time I think it's true and there are improvements like the revamped core, simulations and so on... But to be honest if Maxon charges a subscription fee and phases out permanent licenses people can and should expect more than to wait for basic stuff like thumbnails, even if there are only a few tickets for it.
Thanks for taking your time to check with support, here are the IDs for the original and follow-up ticket:

#757660 14 days ago
#744429 2 months ago

Hopefully this will be solved soon, thanks again for your understanding
Best, Matthias

Hi everyone,

first of all thanks a lot Dr. Sassi, you're doing a great job here but it sometimes seems unfortunately you are the only one
I think I can clear things up a bit, but it only makes it seem worse considering the origin of this problem.
AFAIK – means I read it on the interwebs – Apple changed the way thumbnails (and quicklook) works going forward from Sequoia … check this website for details:

https://eclecticlight.co/2024/10/31/how-sequoia-has-changed-quicklook-and-its-thumbnails/

so if we take a look in the package of the most recent cinema4d update from april 25 (sic!) we find this fella here: "Cinema 4D.qlgenerator"
Let's quote the article again:

"...To check whether an app is still trying to use an old QuickLook Generator, look inside the app bundle in Contents/Library/QuickLook. If you see one or more .qlgenerator bundles there, then those no longer work in Sequoia."

So the root of the problem is that it's not a bug, it's simply Maxon failing to implement changes in macOS that have been announced years ago and now are live and breaking things in Cinema4D since October last year at least. That would be bad enough, but I alone already filed two support tickets in this time which have both been marked "solved" not even tackling the real problem, and I guess many others have done the same and/or are fighting with the problem. And Maxon recommends using the latest versions of macos since apple fixes gpu drivers all the time, so seriously what the hell is going on?
BTW Anchorpoint, a 3rd party tool somehow manages to display thumbnails for C4D on sequoia, maybe Maxon should ask Matthäus to come back and fix a few things in the code
I just got the email that my MaxonOne Sub is coming up for payment again, and I never felt so bad about spending the money for C4D since I started using R13 long long time ago.

Oh hey, the article sums it up pretty nicely btw:

"If the app you rely on to generate custom QuickLook Thumbnails and Previews doesn’t yet come with those App Extensions, contact their Support and ask them when they’re going to implement the changes brought five years ago in Catalina. Particularly if you’re paying them a subscription, it’s time they caught up. Until they do, I’m afraid those Thumbnails and Previews simply won’t work in Sequoia, and you’ll continue to see generic icons rather than Thumbnails."

Best, Matthias

EDIT: Sorry, just noticed the website already has been posted, which makes me feel even more disappointed now how little progress has been made.

I was about to start a similar post - is it just me or is the state of C4D (plugins especially) as bad as in a long time? We had a good run recouperating after switching to python3, but right now like 50% of the plugins I used all the time are not working in 2023. Most puzzling is CV-Toolbox, a plugin DEVELOPED BY MAXON and adding features that should have been in c4d core versions ago.
As if this isn't bad enough, despite really someone asking in the forums every single day there is no statement or development-updates on this topic. I mean, WTF is going on?
It's a legit approach to "beta" features in official releases, but maybe Maxon should also be more transparent about the development process and state of things - I remember plugin authors
being not to happy about updating their plugins for every single release, and that was years ago when actually most of them still did care. IMHO one reason why Blender's ecosystem is thriving is because you can just take a look at what's going on with the development process, and plan accordingly.
And to add insult to injury you have assets in the Asset Library that are only available to Maxon One subscribers while basic functionality is still not working or lacking alltoghether.
I always kinda shy away from ranting about cinema4d and other software (except adobe I guess) because my little programming knowledge tells me making software is really really hard,
but as a customer for more than 10 years (and being shown very little love at that btw) I can't stop feeling a little bit pissed right now.
So sorry for hijacking this thread, but it has been on my mind for some time now.
Let's hope it's the "it has to get worse before it get's better", I really do want to believe that.