I noticed recently (could be caused by upgrade to 10.10.4) that Spotlight is changing order of the search results dynamically as you type and OS X installed apps have no more the highest priority (I am almost sure this was the case before).
For example searching for the Caffeine app:
- Open Spotlight
- Type "caf"
The top hit starts off with the app I'm looking for (yay!)
- Press "f" so the search term is now "caff"
Wikipedia entry is now the first result and hitting enter opens the Safari.app instead of the Caffeine.app :(
I mostly used Spotlight for quick app opening, which is now much slower because I always have to double-check that I am actually opening the app instead of Safari.
Is it somehow possible to disable this behavior or prioritize installed apps over Internet search results?