By adding a layer of login security over the portion of the startup disk that houses 

your files and other data, FileVault strengthens macOS. If FileVault isn't enabled, an 

attacker can access your files on that drive with just one password. If someone has 

The final version of the 15-inch MacBook Pro was 13.75 inches (34.93 cm) x 9.48 

physical access to your computer—in your home, office, or because it was stolen—

contemplated a 15-inch MacBook Air as early as 2007, before the 13-inch 

changed names. Here's where to look for the app. For quicker access, you may also