Mac OS X Lion introduced many changes inspired by iOS that persisted in OS X Mavericks as well as OS X Yosemite, although the latter changed the overall aesthetic. Scrollbars were removed and scrollbar handles turned into thin, semi-transparent bars that disappear when not used. The corner radii of push buttons were reduced, giving an appearance similar to Mac OS 8 and 9. The gel-like appearance of most components was replaced with a slightly glossy and flatter look. Window backgrounds became slightly brighter and window corners were rounded. Lion also added more animations.