I have an iOS app which has an embedded Quicklook Extension that works perfectly - in the Files app on iPad/iPhone I can QuickLook view and edit custom file types without problems. However, when I run the app on a Silicon Mac using Mac Catalyst (or (Made For iPad)) while the Finder does recognise the custom file types (allowing "Open in…" or double-clicking to open) it does not show the Quick Look extension. How do I add Finder QuickLook extension functionality to a Mac Catalyst app?
Thanks
I have verified Catalyst Quick Look extensions work fine on macOS 15.4. Please file a Feedback with a sysdiagnose.
Did you sanity-check in System Settings if it's toggled on?
What happens if you export the iPhone app 'direct release' and then launch the .ipa installer from the mac?
What UTType is it?
Do you happen to have another, maybe older, extension somewhere in your mac, including inside Derived Data or an .xcarchive?
What happens if you do, in terminal?
uttype --extension xxx --verbose
xxx your uttype without the dot
Is that correctly the uttype expected or is there a rogue one as well?