No thumbnail preview in Finder

[s-zh]

I updated my Mac to Sonoma 14.2, but webdav no longer displays thumbnails in Finder. Has anyone encountered the same problem?

[websnowtea]

same issue with 14.2.1.
Mountain Duck 4.15.1 (21679)

[DannyAmmon]

I can confirm this, same OS and software version, thumbnails gone. Finder settings are set to show icon preview, and it does on my hard drive, but not on all of my Mountain Duck drives.

[DannyAmmon]

Updated to Mountain Duck 4.15.2 today, problem persists.

[will-huang9531]

It seems that Apple has modified its WindowServer strategy in the macOS14.2.1, which may affect the display of thumbnails.
Other cases also show that Finder seems to have some issues with its thumbnails, and it is unclear whether Apple has done anything about it.
Anyway, my mountainduck has been in an unusable state since this macOS14.2.1 update.

[dkocher]

Check your setting in Finder → View → Show View Options → Show Icon Preview.

[websnowtea]

thanks for getting back!
Yes, the Show Icon Preview was enabled.

[will-huang9531]

same issue，When I updated my Mac to Sonoma 14.2，and mount a network disk using the webdav, the Icon preview doesn't work in finder, so I cannot see the thumbnails. I'm very confident that “Finder → View → Show View Options → Show Icon Preview” has been enabled. Please try to reproduce and fix this issue.

[dkocher]

I can confirm that on macOS 14.2 and later previews are no longer loaded in Finder for files on network volumes as is the case for volumes mounted with Mountain Duck.

[will-huang9531]

Thanks for your reply!
However, network volumes(webdav) mounted directly by finder can load previews normally, while those volumes mounted with Mountain Duck cannot load previews.
Is there any way to make the previews on the network volume mounted with Mountain Duck load normally on macOS 14.2 and later？

[websnowtea]

Issue is still not resolved on Mountain Duck 4.15.4 (21882) with MacOS 14.4.
Are we able to open an issue with this?

[dkocher]

As a workaround for this issue please set the custom mount location outside the default ~/Library/Group Containers/… and instead set it to a folder in your user home or another folder not protected by application group entitlement. The default will change in an upcoming bugfix release to ~/Library/Application Support/Mountain Duck.

[liangzx96]

Can you provide some instructions on how to change the mount location? I don't find a way to change this setting. Thank you

[liangzx96]

Never mind... I found it's located at Sync pane of Preferences.

[liangzx96]

I can confirm changing mount point solves this issue!