Lion also read the serial number in ist and calculates the making year out of it. In fact iMac has a mobility version just like our Laptops, only that Apple not uses LVDS for screen signal but "Displayport". My ATI is identiefied as 4670 although it is a 4650, but they are so close that it basically the same. iMac 9,1 ( core2duo 800mhz ram ) - 10,1 - 11,1 ( Intel xeon 1300 mhz RAM ) are good for Mobility Radeon HD46xx - they all work for me perfect while the 9,1 model is best for my real cpu. some knowledge needed of which mac uses which cpu and which gpu might be handy. ist in /Extra makes the "Identification". I see you guys "About this Mac" identified your machine as "MacBook" but mine is "iMac", maybe that is an issue need to be fixed. upon every system reboot, I have to use the function key to turn it down manually. Framebuffer Personality "Hoolock" doesn't work for my HD5470M - no display at all, I use the default "Eulemur" with Lion GM, QE/CI works! Only issue now is that I cannot get screen sleep to turn off the LCD backlight, the screen will only blank out upon screen sleep activated but I can see the backlight is on.
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