EasyFind, Find Any File and HoudahSpot compared, and tested against a wide range of search targets. The results are surprising.
mdimporter
Details the contents of files which are built into Spotlight’s index, its reliance on keys, how apps can perform Spotlight searches, and the three bundled tools for users.
Almost 16 years old, many think it has grown steadily worse. It has faced new challenges such as iCloud, privacy, and APFS backups. Here’s how it works, and how to get the most from it.
Yosemite’s extended search reaches out to Bing, Maps, and more. But how can you get the best out of its local search facility?
The Eclectic Light Company 