Parallels has released an update to Parallels Desktop 8 for Mac, the software for running Windows and Mac applications side-by-side on a Mac without rebooting. The new version includes experimental support for the latest developer preview of OS X Mavericks.  

By updating to the latest build of Parallels Desktop (build 8.0.18494) and following instructions in the Parallels blog post, developers who are registered members of Apple’s Developer Program can run Parallels Desktop 8 on OS X Mavericks and run OS X Mavericks in a virtual machine in Parallels Desktop 8 for Mac.
Parallels Desktop 8 for Mac — which also supports the desktop virtualization of Windows, Mountain Lion, Lion, Linux, Chrome OS and more — enables software, mobile and web developers to test a variety of operating systems as guests, as well as well as develop and test applications on them without risking their development machines. Learn more at .