Display: Screen size is measured diagonally. The display on the 14-inch MacBook Pro has rounded corners at the top. When measured as a standard rectangular shape, the screen is 14.2 inches diagonally (actual viewable area is less). The display on the 16-inch MacBook Pro has rounded corners at the top. When measured as a standard rectangular shape, the screen is 16.2 inches diagonally (actual viewable area is less). iMac 24‑inch actual diagonal screen measurement is 23.5 inches.