From Xojo Documentation
Class (inherits from none)
| This class is only available on the macOS platform.
For cross-platform compatibility, use ＃If...＃Endif with the Target... specifiers to make sure you will not attempt to use this class on an incompatible platform.
Used to manage results from a SpotlightQuery. Supported only on macOS. It does nothing on other operating systems.
See the examples for SpotlightQuery which use the File property to display attributes of the each search result.