Hello Wanted to hear what Yosemite users were able to customize. Also here are few things I have tried and was successful. 1. cDock.app - Gives you that 3d dock, so much better than the 2d flat one. 2. Dark Menubar - Sys Pref > General > Check <Dark Mode> 3. Theme - I usually prefer Darker themes on the OS and was not happy with Yosemite's Transparent/Translucent buttons, I could hardly read the text on them. Few tweaks in settings, Sys pref > Accessibility > Check <Increasing Contrast> & <Reduce Transparency> That kind of helped but I would still like to acquire a darker theme. 4. Chrome - Some nice Night browsing themes with the add-on called 'Stylish' and its themes. 5. Still looking for any customizing anyone has done with the iMessage.app. Would love to see a darker theme on it. Care to share your customizations ?