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Thanks P1LGRIM, I already tried that method. I always get the same error: "This utility can NOT be executed on this platform. Please check other version utility again". Still searching for a version which works on ProBook 4540s Ivy Bridge...

Today when I turned on my Probook I faced an error message at system start up. After searching the internet, I noticed It is a common problem among HP notebooks. This a BIOS related problem which results in losing product information stored in motherboard like Serial Number, PCID, UUID, Notebook...

Enable Intel Virtualization Technology in the BIOS...

Yes, It is working correctly for me. No problem in Sleep/Restart/Shut Down.

About the warning message for the kexts it is normal because the kexts are not signed. for re-Patching you DSDT.aml which is in /Extra: 1.Open MaciASL 2.File>Open> Your DSDT.aml File 3.In the new opened window choose "Patch" 4.Choose "Native Backlight Fix" (If RehabMan's repo is not...

GR8888888888888 Work!!! :) It's working for me. Radeon is not enabled in Mac anymore. I'm using Clover. About DropSSDT I added a new entry for Drop Tables (SSDT-TableId-SgTabl) But even without that it is working. no problem in sleep function.Thanks philip_petev and RehabMan.

I would be glad to test the new method. What should I do beside patching the DSDT?

That guide is a bit confusing. Just use nguyenmac's guide and be sure to create another partition for Linux when creating one for windows (forget about SWAP partition if you are using SSD and have more than 4GB RAM). After installing Mac and windows. create a boot-able USB of your desired Linux...

Thanks farhanahmed95 :)

Guys, anyone knows how to modify *.efi files? I enabled Bit-locker in Windows 8.1 which created a new recovery partition. Now Kali Linux won't boot. It seems it is because of change in partitions which causes bootloader to lose the Linux target partition for boot.

You had to install windows 8.1 through windows 7 (By running the installer inside windows). Now, use a bootable USB flash which contains Chimera/Chameleon. Boot into Mac OS X. re-install Chimera/Chameleon Bootloader. More info...

RehabMan thanks for your hard work. :) I downloaded the kext and installed it. do we need to repatch the DSDT to make it work?

Thanks a lot. Yes the new method is working (thanks to nguyenmac) but the previous method was not working. I tried everything like EC resetting, repairing permissions, disabling fast-boot and Hybrid UEFI but no luck. Now it's working as it should! :)

kuglee I'm having problem getting AppleHDA work on my 4540s, would you please upload your config.plist + AppleHDA.kext?

Guys in my case, I disabled AMD 7650 in BIOS, then installed my triple-boot using nguyenmac's guide, I patched my DSDT using PBI 6.1.11 and finally re-enabled AMD 7650 in BIOS. I have no problems related to graphic cards. I can use both graphic cards in windows and HD4000 in mac. On previous...

RahebMan I used several applications like iStat and XRG. The have the same problem in reporting fan speed. It seems the problem is not related to HWMonitor. Also using iStat the battery reporting problem is gone(With or without having EmuVariableUefi-64.efi)

Having the same problem here. Actually the fan is working as it should but there is problem in reporting. I put the laptop in a cold place. after a while starting the laptop the CPU was about 37' and the fan was off(showing "-" in HWMonitor). I used Geekbench to test the fan. soon the fan...

I'm using BIOS F.43. (UEFI without CSM) I did a clean installation without using EmuVariableUefi-64.efi. every thing was working good (I don't use Find My Mac) but Installing it through Clover Configurator causes the problem. Here is my boot.log file:

It doesn't work in this way (for me), Having the EmuVariableUefi-64.efi in /EFI/CLOVER/drivers64UEFI results the battery percentage error... :(