Hello, I have found the following threads: https://forums.macrumors.com/threads/macos-sierra-theme-for-os-x-leopard.2008099/ https://forums.macrumors.com/threads/el-capitan-theme-for-os-x-leopard.1947376/ https://forums.macrumors.com/threads/mountain-leopard-powerpc-theme-3-0.1410493/ Only the Mountain Leopard theme is available to be downloaded. How can I install the Sierra or El Capitan themes? They are not available to be downloaded from those topics. What I would like to get is the transparent top bar, dock looking the same way as in Sierra, and a little brighter windows frames and UI elements more flat. I don't need all those apps, etc. I just would like to change the look of Leopard.