2015-09-11 New and complete steps to patch dsdt and ssdt.
Ok, I decided to write up a full tutorial about how I get my Yosemite 10.10 to work on my HP SleekBook Haswell i7-4550U HD5000: Sleep/wake/battery/sound/backlight slider/speedsteps/turbo/USB3.0. It’s a long video, but it starts from the beginning to end. It took me a long time to figure out how to get it done. I may not do it correctly, but my laptop is working very nicely and solidly.
If we patched and generate SSDT’s correctly with ssdtPRGen.sh, we should achieve the idle @ 800Mhz and maximum Turbo designed by the manufacturer.
For Ivy Bridge HD4000 Patching
How to patch DSDT & SSDT on HP i5-4210u HD4400
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ans I installed voodoooHDA and AppleHDA Kext it did not fixed .
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