This floating-point value is a value between zero and one with zero being black and one being white, and decimal values in between would be a shade of gray (light grays being closer to one and dark grays being closer to zero). In machine code, there is an instruction (command) that moves a floating-point value into a floating-point register in the cpu. The way it works is, the kernel tells your graphics card to display a light grey/dark grey color composition in a shape of a dock. As mention in some of my previous posts regarding desktop customazation on OS X Mountain Lion, there is no way how you could make OS X 10.8 display an image dock background, since Apple no longer uses png files to compose the dock. While the creator of the app has added some pretty cool features, it's still not what the majority of users who'd like to customze their dock is actually looking for.
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My 2D (if you like my 2d dock I can tell you guys where to get it and how to install it on your system): To save people some time I have added some screenshots of the app and dock effects, you can click on the images to get a larger view: There is a nice partial transparent 3D Dock option, but it's still not what I or most people here are looking for. This app has nice features, but it does not allow you to change the dock shelf background. Thanks for the information mediumiddle, it's much appreciated.
If you are not happy about not being able to customize your dock, it's always best to share your fustration with Apple, just send them some feedback and let them know (that's what I did): The app that we would need in order to change the dock in OS X Mountain Lion, is not replacing icons/images but rather modifying the system itself.
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Even if one dares to develop an app to address this problem, it wouldn't be just a tremendous amount of work, but also a certain violation of Apple's software agreement.ĬandyBar (is a customization tool for OS X that lets you customize the Dock appearance and icons) does not modify your system, it only replaces icons and images, thus in compliance with Apple's software agreement. Both the dock and dashboard have been rewritten from ground up. The new OS X dock is rendered by your graphics card's GPU, in order to apply a custom dock, one would have to develop an application which disables dock rendering by the graphics card, but this will most-likely interfere with your desktop experience, since dashboard and a few other apps/functions in the new OS depend on the new rendering process. If you can't live without a custom Dock like me, you'll have to downgrade to OS X Lion! In OS X Mountain Lion Apple changed how the Dock is rendered, so it's no longer possible to customize the Dock's look.