@philosophy-chemical
hi , I try anchor but I can't find all the files in external drives , maybe is something I am doing wrong.

I figure out another solution, I install an VM on parallels with Sonoma , just instal a R25 without licensing it, and I can see from there the thumbnails when I need.

any way from the answer from technical support I don't see any solution from Maxon soon. maybe they need group lawsuit from the Mac users for discrimination because we pay the same amount of money with windows users

this is the answer form tech support

Thank you for reaching out to us and sorry for the issues you are experiencing while using our software.

I'm sorry, this problem is not yet resolved and it may take some time. However, I will forward your information to our development department.

Please read this information on how to handle errors and the difference between troubleshooting and technical support:

Due to the nature of software development and testing,
We are unable to offer any dates or time frames on product releases, updates, or bug fixes.
This allows our development teams to remain flexible in addressing priorities,
And ensures that they have the time needed to produce the best products and find the best solutions for our creative user community.

Please feel free to check our Maxon release notes page for information on all current releases as they become available.
We will be closing this Support ticket, but it does not mean that we are closing the bug ticket.
For more information on this, please see the FAQ: Bug Reporting, Fixing and Feedback

I'm sorry for this inconvenience.
Kind regards,

Jörn Gollob

Cinema 4D Technical Support

It's a shame that such a large company doesn't consider its customers who pay many thousands of dollars. It also makes a clear distinction between Windows customers and Mac customers. Obviously it's based on the fact that, they don't run away to go to the blender. Great shame, 2 years now.

hello again! is there any update about the Quick Look issue in newest MacOs.

I ask this in google AI

is the Quick Look for .c4d files work in Tahoe?

No, the standard Quick Look functionality for .c4d files does not work in macOS Tahoe (macOS 16).
The native Quick Look generator plugin included with Cinema 4D uses an older file format (.qlgenerator) that is incompatible with recent macOS changes introduced in Sequoia and continued in Tahoe.
Current Status on macOS Tahoe
Quick Look (Space Bar Preview): Pressing the space bar on a .c4d file will likely only show a large generic icon or no preview, rather than a render of the 3D scene.
Icon Previews (Thumbnails): Similarly, Finder thumbnail previews are generally broken, and you will see a default application icon instead of a preview of the file's content.

Potential Solutions
Maxon is aware of these compatibility issues with newer macOS versions and is expected to release an updated Quick Look extension (using the modern App Extension format required by Apple) in a future software update.

Until Maxon releases an official fix:
Ensure "Show icon preview" is enabled: Check Finder View Options for the folder to ensure thumbnail generation is requested by the OS.
Keep Cinema 4D updated: Ensure you have the latest version of Cinema 4D installed via the Maxon App, as a fix will come through an update.
Check System Settings: You can look in System Settings > Privacy & Security > Extensions > Quick Look to see if any Maxon options appear, but they are unlikely to function correctly if they are using the old format.

hello I have the same problem after updated in Sequoia 15.1. any help will be greatly appreciated. thanks a lot