Phrase Shift is Untested on macOS
Phrase Shift has not yet been tested on macOS.
About Phrase Shift
Before you lies a simple clue: FOUR MINUS THREE. Shift the words in the definition, and the answer reveals itself:

But can you determine the answer to more difficult definitions? More than 600 puzzles in various categories await!
macOS Game Tests
Phrase Shift tested on macOS.
Phrase Shift was released natively on macOS, though it may not run on newer versions of macOS.
Phrase Shift hasn't been tested yet on macOS.