Jake Lo

See this guide might be a starter.

See wireless under the R&D section

myHack is not Yosemite ready. If you have myHack.kext in S/L/E, delete it. Install the patched AppleHDA to S/L/E repair permission and cache with the following command sudo chmod -R 755 /S*/L*/E* sudo chown -R 0:0 /S*/L*/E* sudo touch /S*/L*/E* sudo kextcache -Boot -

Yes, patch to the layout-id mentioned in the download.

Upload it here. I'll try to patch it for you.

You'll need to extract a raw DSDT from your system first. Boot your system with DSDT=0 IntelCapriFB=9 -v -f Remove the DSDT from /Extra, then launch MacIASL or Chameleon Wizard to extract it.

Guide updated!

Perhaps platform-id 9 works better for your system. Restore the original DSDT and the FB I patched for 10.9.5. Then try booting with -f again, see if there's any difference.

I seem to have the same issue with my system with nvidia/HD 4000. Booting with -f fixes it.

Remove AppleIntelCPUPowerManagement from Kexts folder. It's already in the config.plist to patch on the fly.

Post # 4 Extra_E7x40

Make sure you have nullCPUPowerManagement in /Extra/Extensions

backup your dsdt and FB and try these. Repatched to platform-ID 4 xps_L421x.zip

USB will work with the patched DSDT. Right now, we're trying to figure out the correct value to get full QE/CI for your display. Then I could repatch your DSDT. Have you try the different value? from 0 to 11

Could be a DSDT issue. Do you have same CPU as the OP? Try same boot flags but with different FB value DSDT=0 nv_disable=1 GraphicsEnabler=Yes IntelCapriFB=4 dart=0 -v -f

Try this boot flag DSDT=0 nv_disable=1 GraphicsEnabler=Yes IntelCapriFB=9 dart=0 -v -f

Try generating your own with SSDTPRGen.sh from my boot pack.

ACPIBatteryManager and patched AppleIntelCPUPowerManagement. I only use Chameleon. What did you do to get the sd card to work? Adriandb was having issue getting it to work.

try booting with npci=0x2000 or npci=0x3000

You can find the patched DSDT for nvidia here.

in Extra/Extensions/SLE, there are 2 patched FB. AppleIntelframebufferCapri-03 and AppleIntelframebufferCapri-04 Only install the one, not both. Select the one that's set for you display and rename it to AppleIntelframebufferCapri.kext and then install it to SLE.

https://osxlatitude.com/index.php?/topic/7478-dell-latitude-yosemite-install-guide/&do=findComment&comment=45213 Bootpack in post #4 of guide

Here. Tuned to MacAir 5.2 FakeSMC.kext.zip

you can easily google it, but here is one source.

Go ahead and replace all files with my boot pack since I don't know what you have and what build process you're following. Install latest Chameleon loader if you're using something else. I only tested on Chameleon, not sure if it'll works for anything else.