Downloading Yosemite UX Pack 4.0 from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this software available. This free PC program was developed to work on Windows 7 or Windows 8 and can function on 32-bit systems.
We recommend checking the downloaded files with any free antivirus. This free tool was originally developed by Windows X's Live. Yosemite UX Pack lies within Desktop Tools, more precisely Themes. The following versions: 4.0, 3.0 and 2.0 are the most frequently downloaded ones by the program users.
From the developer:
Yosemite UX Pack is a theme pack that enables users to experience OS X Yosemite themes and wallpapers on their Windows systems. Also, the users can enjoy OS X Dock emulation with pre-configured docklets optimized for stability/performance. Yosemite UX Pack requires Windows 7 and above.
You may want to check out more software, such as Windows 8 UX Pack, Lion UX Pack or Windows 8 Transformation Pack, which might be similar to Yosemite UX Pack.