For over 16 years StitchBuddy for Mac is providing Quick Look previews and thumbnails of your embroidery designs, e. g. in Finder views.
In macOS 15 "Sequoia" Apple is going to drop support for legacy plugins (aka "Quick Look generators") in favor of the next generation preview and thumbnail extensions - introduced for years, especially on iOS.
@IgnacioA has pointed out that StitchBuddy is still using the deprecated plugins, so no previews and thumbnails are shown in the early beta versions of Sequoia. Thanks again for the heads up!
I have already developed the new extensions, which are currently in internal testing. Rest assured that - once macOS 15 is shipped - StitchBuddy will be ready, providing the same user experience as in the past…