cases, a compatible version of QuickTime 7 is included on Snow Leopard installation disc and may be installed side-by-side with QuickTime X. Users who have a Pro license for QuickTime 7 can then activate their license. A Snow Leopard compatible version of QuickTime 7 may also be downloaded from Apple Support website. The software got an increment with the release of Mavericks, and as of August 2018, the current version is v10.5. It contains more sharing options (email, YouTube, Facebook, Flickr etc.), more export options (including web export in multiple sizes, and export for iPhone 4/iPad/Apple TV (but not Apple TV 2). It also includes a new way of fast forwarding through a video and mouse support for scrolling. Starting with macOS Catalina, Apple only provides QuickTime X, as QuickTime 7 was never updated to 64-bit, affecting many applications, image, audio, and video formats utilizing QuickTime 7, and compatibility with these codecs in QuickTime X. Platform support Creating software that uses QuickTime QuickTime X QuickTime X previously provided the QTKit Framework on Mac OS 10.6 until 10.14. Since the release of macOS 10.15, AVKit and AVFoundation are used instead (due to the removal of 32-bit audio and video codecs, as well as image formats and APIs supported by QuickTime 7). Previous versions QuickTime consists of two major subsystems: the Movie Toolbox and the Image Compression Manager. The Movie Toolbox consists of a general API for handling time-based data, while the Image Compression Manager provides services for dealing with compressed raster data as produced by video and photo codecs. Developers can use the QuickTime software development kit (SDK) to develop multimedia applications for Mac or Windows with the C programming language or with the Java programming language (see QuickTime for Java), or, under Windows, using COM/ActiveX from a language supporting this. The COM/ActiveX option was introduced as part of QuickTime 7 for Windows and is intended for programmers who want to build standalone Windows applications using high-level QuickTime movie playback and control with some import, export, and editing capabilities. This is considerably easier than mastering the original QuickTime C API. QuickTime 7 for Mac introduced the QuickTime Kit (aka QTKit), a developer framework that is intended to replace previous APIs for Cocoa developers. This framework is for Mac only, and exists as Objective-C abstractions around a subset of the C interface. Mac OS X v10.5 extends QTKit to full 64-bit support.