Jake Lo

@Jack_77 follow the note at the end of post #2

Yes, no issue so far. See here for updated files.

Are you having artifacts issue with BIOS A13? Downgrade to A12 or A11

1) yes 7) When you launch Chameleon Wizard, it'll automatically open smbios.plst from the default location /Extra. Basically you want to generate a unique serial and not use the one from my bootpack To boot without the -v and -f flags, add /System/Library/Kernels/kernel to org.chameleon.boot.plist found in /Extra. Chameleon Wizard will launch it automatically. When you launch CW, click on the org.chameleon.boot.plist tap. On the bottom left, put a check on kernel and enter /System/Library/Kernels/kernel in the space below it. Save and reboot without the flags.

Try files here but keep your DSDT/SSDT

arghargh, To use HD3000, you need to have Optimus Enabled. DSDT-off_2ch.aml just means that it's patched to turn off Nvidia. I could name it whatever I like, it just easy for me to differentiate from the others. 2ch just means dualLink since you have resolution higher than 1366x768. No need to start over, just replace the DSDT and rename it, enable Optimus in BIOS and you're set. The Exx20 (Extra) already have the patched AppleIntelCPUManagement.kext in /Extra/Extensions/SLE. The guide stated, after installed and logged in: 1) Rename NullCPUPowermanagement.kext to NullCPUPowermanagement.bak ( will need to rename it back before any update to prevent KP) 2) Install all kexts in /Extra/Extensions/SLE to /System/Library/Extensions with kextwizard 3) Reboot

Does the Yosemite Hdd shows as RAID with Lion Icon? If so, see troubleshooting from the guide.

Yes, nullCPUPowermanagement is already in the bootpack. try booting with /System/Library/Kernels/kernel -v -f

in the clover menu press the space button and select boot without caches then hit enter. it should boot in verbose mode and show where it is getting stuck.

do you see the Yosemite disk during boot? Since you have it installed previously, can you restore the files prior to using Herve's files?

You need to replace them in /System/Library/Extensions. You might want to back up the original first.

Where did you get the source file to create the Installer?

Check here too.

See here.

Can you see the Yosemite partition from your running Mavericks? Bootpack from Herve's guide are for Mavericks, some of the kexts might not work on Yosemite.

Make sure you have ACPIBacklight.kext installed for the brightness. For sound check your old DSDT, is it the same layout id?

Thanks Herve. Didn't notice that. New thud sound is not as nice as chirping from Mavericks.

Yes, but might need a different DSDT. Get it from here. Generate your own SSDT from the guide.

Which graphics card is listed when you use GraphicsEnbler=Yes or No?

Try adding AtiConfig=Langur, GraphicsEnabler=Yes/No to org.chameleon.boot.plist If ATI 5470m is not supported, you could try disabling it and use the 1st Gen Intel HD graphics. To boot with that, you'll need to remove AppleIntelHDGraphics* To get full QE/CI with that, you could read more about it here.

Awesome! Enjoy

Update! Found a workaround to fix the internal display for NVS4200M (Optimus Disabled) See here.

After a lot of trial and error, I finally got the NVS display working with the original DSDT. I guess Apple has made a lot of changes to their video kexts since 10.9.2 ( Nvidia and Intel). I went back and tested all the installer from 10.9.0 -> 10.9.5 and 10.10.1. That last version that the internal display shows up is 10.9.2. So I rolled back 10.9.5 installer nvidia files with 10.9.2 and it worked and also worked on 10.10.1. Files I replaced are: NVDAGF100Hal NVDAResman NVDAStartup (optional- works without roll back) So far I haven't see any issue, but will need further testing. Attached are the files if you don't have 10.9.2. Also included is an updated DSDT to fix the Battery issue and IOAHCISerialATAPI_Injector.kext to fix the DVD Player error. NVS4200m.zip

Check thread here. Lots of information.

That should work without any issue if you follow the guide closely. Which one did you follow? Optimus enabled or disabled?