When your Mac's storage is almost full, macOS Sierra will help you make some space. You might have come across that dreaded message: "Your startup disk is almost full." The computer wants more space, and the only way to make that happen is by deleting files. But, how do we know what files to delete? In OS X El Capitan, we have to manually dig through old files and delete them as we find them, like some kind of animal. With macOS Sierra, Apple is making it easier to make space by allowing us to set up Optimized Storage, which...
