The iPad syncs with iTunes on a Mac or Windows PC. It is available for Linux, Windows and Mac OS X. They think nobody writes malware for Linux or Mac OS X. Folx is a download manager for Mac OS X. Music is uploaded via the Amazon Music player for PC and Mac. However, there were no 64-bit versions of CS4 available for Mac OS X. Windows, Mac, and Linux build agents are currently supported. This change caused problems for developers writing software for Mac OS X. FileMaker files are compatible between Mac and Windows. Apple moved to a nanokernel design in Mac OS 8.6. It was developed by Overhaul Games for PC, Mac, and iPad. Safari 6 is available as a download for Mac OS X Lion. Ltd. (Scotland), for iPhone/iPad/Mac platforms. The SDK is a free download for users of Mac personal computers. There were three tracks for developers, iPhone, Mac, and IT.