Lenovo ThinkPad T420 with UEFI Only

XentriX0110 · May 19, 2017

@XentriX0110

welcome to the group!

not clear whether you were able to install the Kexts with _kext-install.command utility or not?

this tool will copy the kexts from the zip file - in particular AppleHDA_20672.kext - into the HD /Library/Extensions folder and fix up common issues.

Sound will not work unless this kext is copied to the OS partition versus just with the ESP under clover

what version of 10.12?

I was able to install the kext files with the command utility. After this I rebooted to test and this is not work. I also tried installing them using the Kext Utility and same results.

When I use About Mac it only displays 10.12

tluck · May 19, 2017

well 10.12.0 is pretty buggy. So perhaps you can update your OS to the recent stable release - 10.12.5 - use the app store to download the update.

you can also rebuild the caches to make sure.

sudo kextcache -i /

should like this this:

$ sudo kextcache -i /
kext-dev-mode allowing invalid signature -67062 0xFFFFFFFFFFFEFA0A for kext VoodooPS2Trackpad.kext
kext-dev-mode allowing invalid signature -67062 0xFFFFFFFFFFFEFA0A for kext VoodooPS2Mouse.kext
kext-dev-mode allowing invalid signature -67062 0xFFFFFFFFFFFEFA0A for kext VoodooPS2Keyboard.kext
kext-dev-mode allowing invalid signature -67062 0xFFFFFFFFFFFEFA0A for kext VoodooPS2Controller.kext
kext file:///Library/Extensions/IOAHCIBlockStorageInjector.kext/ is in hash exception list, allowing to load
kext-dev-mode allowing invalid signature -67062 0xFFFFFFFFFFFEFA0A for kext IntelMausiEthernet.kext
kext-dev-mode allowing invalid signature -67062 0xFFFFFFFFFFFEFA0A for kext CPUSensors.kext
kext-dev-mode allowing invalid signature -67062 0xFFFFFFFFFFFEFA0A for kext ACPISensors.kext
kext-dev-mode allowing invalid signature -67062 0xFFFFFFFFFFFEFA0A for kext FakeSMC.kext
kext-dev-mode allowing invalid signature -67062 0xFFFFFFFFFFFEFA0A for kext BlueTooth_Injector_T420.kext
kext-dev-mode allowing invalid signature -67030 0xFFFFFFFFFFFEFA2A for kext AppleHDA_20672.kext
kext-dev-mode allowing invalid signature -67062 0xFFFFFFFFFFFEFA0A for kext ACPIPoller.kext
kext-dev-mode allowing invalid signature -67062 0xFFFFFFFFFFFEFA0A for kext ACPIBatteryManager.kext
KernelCache ID: 7F640E6F88CA43B5C594F351E0B91FA6

to check the kext is there properly, the key item is is a symbolic link to the original AppleHDA in /S/L/E

$ ls -l /Library/Extensions/AppleHDA_20672.kext/Contents/MacOS
total 8
lrwxr-xr-x  1 root  wheel  64 May 10 09:52 AppleHDA -> /System/Library/Extensions/AppleHDA.kext/Contents/MacOS/AppleHDA

$ kextstat|grep HDA
   94    2 0xffffff7f810d4000 0xf000     0xf000     com.apple.iokit.IOHDAFamily (279.48) E332A19C-33F1-3F25-B9FC-982F769BF17A <5 4 3 1>
   95    1 0xffffff7f8112b000 0x1d000    0x1d000    com.apple.driver.AppleHDAController (279.48) ED51F180-19C8-3DE1-AF81-0E389D98ADDE <94 93 77 12 7 6 5 4 3 1>
  114    0 0xffffff7f812cd000 0xb5000    0xb5000    com.apple.driver.AppleHDA (999.99) 806B8C17-50CA-3C6B-90B3-195F38D8FB89 <113 100 95 94 93 77 12 11 6 5 4 3 1>
  118    0 0xffffff7f8282d000 0x2000     0x2000     com.apple.driver.AppleHDAHardwareConfigDriver (279.48) 14690424-1048-3F1D-8A3D-41657C97EB67 <4 3>

XentriX0110 · May 19, 2017

well 10.12.0 is pretty buggy. So perhaps you can update your OS to the recent stable release - 10.12.5 - use the app store to download the update.

you can also rebuild the caches to make sure.

sudo kextcache -i /

should like this this:

$ sudo kextcache -i /
kext-dev-mode allowing invalid signature -67062 0xFFFFFFFFFFFEFA0A for kext VoodooPS2Trackpad.kext
kext-dev-mode allowing invalid signature -67062 0xFFFFFFFFFFFEFA0A for kext VoodooPS2Mouse.kext
kext-dev-mode allowing invalid signature -67062 0xFFFFFFFFFFFEFA0A for kext VoodooPS2Keyboard.kext
kext-dev-mode allowing invalid signature -67062 0xFFFFFFFFFFFEFA0A for kext VoodooPS2Controller.kext
kext file:///Library/Extensions/IOAHCIBlockStorageInjector.kext/ is in hash exception list, allowing to load
kext-dev-mode allowing invalid signature -67062 0xFFFFFFFFFFFEFA0A for kext IntelMausiEthernet.kext
kext-dev-mode allowing invalid signature -67062 0xFFFFFFFFFFFEFA0A for kext CPUSensors.kext
kext-dev-mode allowing invalid signature -67062 0xFFFFFFFFFFFEFA0A for kext ACPISensors.kext
kext-dev-mode allowing invalid signature -67062 0xFFFFFFFFFFFEFA0A for kext FakeSMC.kext
kext-dev-mode allowing invalid signature -67062 0xFFFFFFFFFFFEFA0A for kext BlueTooth_Injector_T420.kext
kext-dev-mode allowing invalid signature -67030 0xFFFFFFFFFFFEFA2A for kext AppleHDA_20672.kext
kext-dev-mode allowing invalid signature -67062 0xFFFFFFFFFFFEFA0A for kext ACPIPoller.kext
kext-dev-mode allowing invalid signature -67062 0xFFFFFFFFFFFEFA0A for kext ACPIBatteryManager.kext
KernelCache ID: 7F640E6F88CA43B5C594F351E0B91FA6

to check the kext is there properly, the key item is is a symbolic link to the original AppleHDA in /S/L/E

$ ls -l /Library/Extensions/AppleHDA_20672.kext/Contents/MacOS
total 8
lrwxr-xr-x  1 root  wheel  64 May 10 09:52 AppleHDA -> /System/Library/Extensions/AppleHDA.kext/Contents/MacOS/AppleHDA

$ kextstat|grep HDA
   94    2 0xffffff7f810d4000 0xf000     0xf000     com.apple.iokit.IOHDAFamily (279.48) E332A19C-33F1-3F25-B9FC-982F769BF17A <5 4 3 1>
   95    1 0xffffff7f8112b000 0x1d000    0x1d000    com.apple.driver.AppleHDAController (279.48) ED51F180-19C8-3DE1-AF81-0E389D98ADDE <94 93 77 12 7 6 5 4 3 1>
  114    0 0xffffff7f812cd000 0xb5000    0xb5000    com.apple.driver.AppleHDA (999.99) 806B8C17-50CA-3C6B-90B3-195F38D8FB89 <113 100 95 94 93 77 12 11 6 5 4 3 1>
  118    0 0xffffff7f8282d000 0x2000     0x2000     com.apple.driver.AppleHDAHardwareConfigDriver (279.48) 14690424-1048-3F1D-8A3D-41657C97EB67 <4 3>

Followed these steps and found some duplicates, Not sure how I did that but I removed them all and reinstalled through kext command and now the sound is working.

The only other thing I don't see working atm is bluetooth. Are there some tests I can run to make sure everything is working?

Edit: I also would need to use the VGA output to a monitor, I am hoping this is doable.

XentriX0110 · May 19, 2017

So I noticed if I start the monitor before boot I can get the display to it also, however, the resolution may be off on monitor? it shows decently clear but shakes.

jkdans · May 20, 2017

Since updating to 10.12.5 and updating Clover to the latest version in this thread, I've been having issues with a bunch of discoloration on the screen and only half of it being drawn. I updated all of my kexts including the new backlight one, not sure where I'm going wrong. Any help is appreciated, I've tried any solutions that have been posted in this thread and nothing has worked yet.

tluck · May 20, 2017

@jkdans

- is your screen 1600x900? if so try this

mount ESP

cd /Volumes/ESP/EFI/Clover/

1) edit config.plist - change Inject Intel true to Inject Intel false

<key>Inject</key>
                <dict>
                        <key>Intel</key>
                        <false/>
                </dict>

2) cd ACPI

cp dsdt.edid.aml patched/dsdt.aml

reboot

jkdans · May 20, 2017

@tluck

That worked! Thank you so much, was worried that I'd have to go back to Windows if it wasn't fixable for a while.

Sherlocks · May 20, 2017

@tluck

That worked! Thank you so much, was worried that I'd have to go back to Windows if it wasn't fixable for a while.

Please attach clover boot.log

Nobody help clover debug for lenovo laptop.....

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XentriX0110 · May 20, 2017

Is there a way to test that the usbs are functioning properly? My traktor s2 controller will connect and be detected and can be used for sound but will not be detected in my traktor app. Also is there any for me to test and figure out what's going wrong where? Ant input?still shaky during VGA also.can Someone point me in the direction to figure it out myself?

Sent from my SM-G935T using Tapatalk

tluck · May 20, 2017

@XentriX0110 -

1) USB - is USB2.0 - and you can test with a "thumb" drive (aka flash drive)

2) VGA - perhaps try a different resolution? what frequency is it?

XentriX0110 · May 20, 2017

@XentriX0110 -

1) USB - is USB2.0 - and you can test with a "thumb" drive (aka flash drive)

2) VGA - perhaps try a different resolution? what frequency is it?

Usbs are working. But I'm not sure if it's working properly for all devices. How do you control the resolution on vga?

Sent from my SM-G935T using Tapatalk

Somez · May 21, 2017

@jkdans

- is your screen 1600x900? if so try this

mount ESP

cd /Volumes/ESP/EFI/Clover/

1) edit config.plist - change Inject Intel true to Inject Intel false

<key>Inject</key>

                <dict>

                        <key>Intel</key>

                        <false/>

                </dict>

2) cd ACPI

cp dsdt.edid.aml patched/dsdt.aml

reboot

Well, I'm still on 10.12.4 and got the same issue. All I saw was colored lines on the screen and nothing else so I got a bit worried about how I'm gonna fix it

After doing a reboot I still got the colors but was able to see a shadow of the screen... well, half of it which was enough to launch terminal and make the above adjustments.

By the way, I installed the heat-step ACPIpoller kext from the Misc folder but it's not working

Update: I tried to install heatstep again and after reboot I got the colored lines issue again even though the INTEL inject was still set to "false" in the config.plist.

After doing

2) cd ACPI

cp dsdt.edid.aml patched/dsdt.aml

The probem was solved. I guess this is because /Volumes/ESP/EFI/CLOVER/ACPI/dsdt.heat-step.aml is different than /Volumes/ESP/EFI/Clover/ACPI/dsdt.edid.aml

Heatstep is still not working and my brightness keys are not functioning either. My brightness is at maximum by default.

tkuck, do you think you can fix the dsdt.heat-step.aml to work without causing colored lines screen on 1600x900? I also would welcome any tips on how to get my brightness keys back

Thank you.

UPDATE #2

Ok I was nervous about losing the ability to change the brightness so I installed the latest pack again and set

<key>Intel</key>

back to FALSE.

I completed all the steps in the guide but stopped before installing the heatstep dsdt.

Now brightness keys are working fine, but I don't have the added benefit of heatstpe dsdt. I guess I'll need help at this point.

tluck · May 21, 2017

@somez and others with screen problems since 4052

there seems be some trouble either with EDID and DualLink or both

here is a test release Clover 4077x - if you set DualLink in the config.plist Clover will use it.

for LCD resolution 1600x900 greater, the OS wants DualLink=1 set. it shows up as property AAPL00,DualLink

the config.1600x900.plist had DualLink=1 and Custom EDID for Injection by Clover

otherwise turn off injection and use the DSDT below - with or without the heat-step method.

there are 4 DSDT files (add one for edid+heat-step)

dsdt.aml - no dual-link, no EDID set, and no heat-step
dsdt.heat-step.aml - no dual-link set, no EDID set, but has heat step method
for 1600x900 with problems:
dsdt.edid.aml - dual-link=1 and EDID for 1600x900
dsdt.edid-hs.aml - dual-link=1 and EDID for 1600x900 and heat-step method

-------

my Clover boot.log has this as output (config.plist has inject Intelgfx true, inject EDID, but removed DualLink=1 as a test - you can see that clover added back in)

4:977  0:000  Intel HD Graphics 3000 [8086:0126] :: PciRoot(0x0)\Pci(0x2,0x0)
4:977  0:000    Found HD Plus Display - 16:9 :: Width=1600 Height=900
4:977  0:000    IntelHDMI: used
4:977  0:000    AAPL00,override-no-connect: added
4:977  0:000    Default AAPL00,DualLink = 0
4:977  0:000    High Resolution Display
4:977  0:000    AAPL00,DualLink: changed from 0 to 1
4:977  0:000    FakeID Intel GFX: not set
4:977  0:000    snb-platform-id: not set
4:977  0:000    Beginning Intel GFX auto-detection with ACPI injection
4:977  0:000    Found FakeID Intel GFX = 0x01268086
4:977  0:000    Found snb-platform-id = 0x00010000

T420_UEFI-Clover-b4077x_10.11_10.12-2017-05-21.zip

Edited May 21, 2017 by tluck

Somez · May 21, 2017

Hi tluck!

I'm afraid I don't understand due to lack of knowledge.
What is EDID and dual link?

Things have been working fine for me until today when I upgraded to the latest package (incl. Clover in the zip).
Don't we (all of us) have the same config? I would've expected more of us having this kind of problem.

Thanks for your help.

Here is my log:

2:540 0:000 Intel HD Graphics 3000 [8086:0126] :: PciRoot(0x0)\Pci(0x2,0x0)

2:540 0:000 Found HD Plus Display - 16:9 :: Width=1600 Height=900

2:540 0:000 IntelHDMI: used

2:540 0:000 AAPL00,override-no-connect: added

2:540 0:000 AAPL00,DualLink = 1

2:540 0:000 FakeID Intel GFX: not set

2:540 0:000 snb-platform-id: not set

2:540 0:000 Beginning Intel GFX auto-detection with ACPI injection

2:540 0:000 Found FakeID Intel GFX = 0x01268086

2:540 0:000 Found snb-platform-id = 0x00010000

2:540 0:000 Intel GFX revision = 0x9

2:541 0:000 setting specified layout-id=12 (0xC)

2:541 0:000 stringlength = 2842

2:541 0:000 CurrentMode: Width=1600 Height=900

Somez · May 22, 2017

Ok, I went through the heatstep installation steps from the guide again, but now I have used the files provided in T420_UEFI-Clover-b4077x_10.11_10.12-2017-05-21.zip and went for the dsdt.edid-hs.aml - dual-link=1 and EDID for 1600x900 and heat-step method. I'm gonna do a restart and hopefully I will be able to boot into a system where I can at least see something )

Wish me luck!

mkdir /Volumes/ESP
sudo mount -t msdos /dev/disk0s1 /Volumes/ESP
cp -a /Volumes/ESP/EFI/CLOVER/ACPI/dsdt.heat-step.aml /Volumes/ESP/EFI/CLOVER/ACPI/patched/dsdt.aml

cd ~/Downloads/Lenovo-T420-Clover-YYYY.MM.DD/Utilities
sudo cp -a ACPIPoller.kext /Library/Extensions
sudo chown -R 0:0 /Library/Extensions/ACPIPoller.kext
sudo chmod -R go-w /Library/Extensions/ACPIPoller.kext
sudo kextcache -i /

Sherlocks · May 22, 2017

Hi tluck!

I'm afraid I don't understand due to lack of knowledge.

What is EDID and dual link?

Things have been working fine for me until today when I upgraded to the latest package (incl. Clover in the zip).

Don't we (all of us) have the same config? I would've expected more of us having this kind of problem.

Thanks for your help.

Here is my log:

2:540 0:000 Intel HD Graphics 3000 [8086:0126] :: PciRoot(0x0)\Pci(0x2,0x0)

2:540 0:000 Found HD Plus Display - 16:9 :: Width=1600 Height=900

2:540 0:000 IntelHDMI: used

2:540 0:000 AAPL00,override-no-connect: added

2:540 0:000 AAPL00,DualLink = 1

2:540 0:000 FakeID Intel GFX: not set

2:540 0:000 snb-platform-id: not set

2:540 0:000 Beginning Intel GFX auto-detection with ACPI injection

2:540 0:000 Found FakeID Intel GFX = 0x01268086

2:540 0:000 Found snb-platform-id = 0x00010000

2:540 0:000 Intel GFX revision = 0x9

2:541 0:000 setting specified layout-id=12 (0xC)

2:541 0:000 stringlength = 2842

2:541 0:000 CurrentMode: Width=1600 Height=900

Your clover log is good. What is your problem exactly? Can boot or not?

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Somez · May 22, 2017

Hi tluck!

I'm afraid I don't understand due to lack of knowledge.

What is EDID and dual link?

Things have been working fine for me until today when I upgraded to the latest package (incl. Clover in the zip).

Don't we (all of us) have the same config? I would've expected more of us having this kind of problem.

Thanks for your help.

Here is my log:

2:540 0:000 Intel HD Graphics 3000 [8086:0126] :: PciRoot(0x0)\Pci(0x2,0x0)

2:540 0:000 Found HD Plus Display - 16:9 :: Width=1600 Height=900

2:540 0:000 IntelHDMI: used

2:540 0:000 AAPL00,override-no-connect: added

2:540 0:000 AAPL00,DualLink = 1

2:540 0:000 FakeID Intel GFX: not set

2:540 0:000 snb-platform-id: not set

2:540 0:000 Beginning Intel GFX auto-detection with ACPI injection

2:540 0:000 Found FakeID Intel GFX = 0x01268086

2:540 0:000 Found snb-platform-id = 0x00010000

2:540 0:000 Intel GFX revision = 0x9

2:541 0:000 setting specified layout-id=12 (0xC)

2:541 0:000 stringlength = 2842

2:541 0:000 CurrentMode: Width=1600 Height=900

Success! I now have heatstep working with no graphical glitches so far.

2:460 0:000 Intel HD Graphics 3000 [8086:0126] :: PciRoot(0x0)\Pci(0x2,0x0)

2:460 0:000 Found HD Plus Display - 16:9 :: Width=1600 Height=900

2:460 0:000 IntelHDMI: used

2:460 0:000 AAPL00,override-no-connect: added

2:460 0:000 AAPL00,DualLink = 1

2:460 0:000 FakeID Intel GFX: not set

2:460 0:000 snb-platform-id: not set

2:460 0:000 Beginning Intel GFX auto-detection with ACPI injection

2:460 0:000 Found FakeID Intel GFX = 0x01268086

2:460 0:000 Found snb-platform-id = 0x00010000

2:460 0:000 Intel GFX revision = 0x9

2:461 0:000 setting specified layout-id=12 (0xC)

2:461 0:000 stringlength = 2842

2:461 0:000 CurrentMode: Width=1600 Height=900

2:461 0:000 Beginning FSInjection

Your clover log is good. What is your problem exactly? Can boot or not?

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Hi Sherlocks!

Let me explain.

May problem was that when I've installed the heat-step dsdt together with the ACPIPoller.kext I booted into a screen with full of moving colored lines and only half of my normal screen was shown as a shadowy background. Too bad I haven't taken a photo for you. I realised things were good as long as I have not performed the heat-step install steps in tlucks guide.

In the past installing heatstep worked fine with no screen issues.

EDIT: Just to clarify. The first boot.log I have copied (the one you replied to) also worked fine but heatstep was not installed that time. I don't have a log from the time when I got the colored screen problem.

Well. I don't want to flood the forum with boot.logs but I've found this at the end (see bold lines):

2:484 0:004 Preparing kexts injection for arch=x86_64 from EFI\CLOVER\kexts\Other

2:484 0:000 Extra kext: EFI\CLOVER\kexts\Other\ACPIBatteryManager.kext

2:486 0:002 Extra kext: EFI\CLOVER\kexts\Other\AppleHDA_20672.kext

2:489 0:002 Thinning fails

2:489 0:000 Thinning failed: EFI\CLOVER\kexts\Other\AppleHDA_20672.kext

2:489 0:000 Extra kext: EFI\CLOVER\kexts\Other\BlueTooth_Injector_T420.kext

2:490 0:000 Extra kext: EFI\CLOVER\kexts\Other\FakeSMC.kext

2:493 0:003 Extra PlugIn kext: EFI\CLOVER\kexts\Other\FakeSMC.kext\Contents\PlugIns\ACPISensors.kext

2:497 0:003 Extra PlugIn kext: EFI\CLOVER\kexts\Other\FakeSMC.kext\Contents\PlugIns\CPUSensors.kext

2:499 0:002 Extra kext: EFI\CLOVER\kexts\Other\IntelBacklight.kext

2:503 0:004 Extra kext: EFI\CLOVER\kexts\Other\IntelMausiEthernet.kext

2:506 0:003 Extra kext: EFI\CLOVER\kexts\Other\IOAHCIBlockStorageInjector.kext

2:507 0:001 Extra kext: EFI\CLOVER\kexts\Other\VoodooPS2Controller.kext

2:511 0:004 Extra PlugIn kext: EFI\CLOVER\kexts\Other\VoodooPS2Controller.kext\Contents\PlugIns\VoodooPS2Keyboard.kext

2:533 0:021 Extra PlugIn kext: EFI\CLOVER\kexts\Other\VoodooPS2Controller.kext\Contents\PlugIns\VoodooPS2Mouse.kext

2:539 0:006 Extra PlugIn kext: EFI\CLOVER\kexts\Other\VoodooPS2Controller.kext\Contents\PlugIns\VoodooPS2Trackpad.kext

2:555 0:015 Extra kext: EFI\CLOVER\kexts\Other\ACPIPoller.kext

2:559 0:004 Extra kext: EFI\CLOVER\kexts\Other\AppleBacklightInjector.kext

2:563 0:003 Failed to load extra kext (executable not found): EFI\CLOVER\kexts\Other\AppleBacklightInjector.kext

2:564 0:000 Preparing kexts injection for arch=x86_64 from EFI\CLOVER\kexts\10.12

Brightness keys work so my system seems to be working fine.

tluck · May 22, 2017

@somez - logs looks ok.

the kext messages in Clover log is about the redundant set in ESP (for installers etc - not used if you install kexts in OS /L/E )

Thinning failed: EFI\CLOVER\kexts\Other\AppleHDA_20672.kext

Failed to load extra kext (executable not found): EFI\CLOVER\kexts\Other\AppleBacklightInjector.kext

so these 2 messages are ok/expected

HDA has symbolic link to binary (doesn't work from ESP)

BacklightInjector is just property injector - no binary

Extra kext: EFI\CLOVER\kexts\Other\IntelBacklight.kext

we don't need it anymore when AppleBacklightInjector.kext is present

manually remove this one ---^

Somez · May 22, 2017

@somez - logs looks ok.

the kext messages in Clover log is about the redundant set in ESP (for installers etc - not used if you install kexts in OS /L/E )

Thinning failed: EFI\CLOVER\kexts\Other\AppleHDA_20672.kext

Failed to load extra kext (executable not found): EFI\CLOVER\kexts\Other\AppleBacklightInjector.kext

so these 2 messages are ok/expected

HDA has symbolic link to binary (doesn't work from ESP)

BacklightInjector is just property injector - no binary

Extra kext: EFI\CLOVER\kexts\Other\IntelBacklight.kext

we don't need it anymore when AppleBacklightInjector.kext is present

manually remove this one ---^

I don't think I have any symlinks in EFI/CLOVER/kexts/Other/

Tamass-MacBook-Pro:Other somez$ ls -la

total 97

drwxrwxrwx@ 1 somez staff 2560 Apr 3 14:50 .

drwxrwxrwx@ 1 somez staff 1024 May 21 21:35 ..

-rwxrwxrwx 1 somez staff 4096 May 14 06:46 ._ACPIBatteryManager.kext

-rwxrwxrwx 1 somez staff 4096 May 14 06:46 ._ACPIPoller.kext

-rwxrwxrwx 1 somez staff 4096 May 14 06:46 ._AppleBacklightInjector.kext

-rwxrwxrwx 1 somez staff 4096 May 14 06:46 ._AppleHDA_20672.kext

-rwxrwxrwx 1 somez staff 4096 May 14 06:46 ._BlueTooth_Injector_T420.kext

-rwxrwxrwx 1 somez staff 4096 May 14 06:46 ._FakeSMC.kext

-rwxrwxrwx 1 somez staff 4096 May 14 06:46 ._IOAHCIBlockStorageInjector.kext

-rwxrwxrwx 1 somez staff 4096 Feb 5 18:26 ._IntelBacklight.kext

-rwxrwxrwx 1 somez staff 4096 May 14 06:46 ._IntelMausiEthernet.kext

-rwxrwxrwx 1 somez staff 4096 May 14 06:46 ._VoodooPS2Controller.kext

drwxrwxrwx@ 1 somez staff 512 Dec 28 19:56 ACPIBatteryManager.kext

drwxrwxrwx@ 1 somez staff 512 Feb 22 03:40 ACPIPoller.kext

drwxrwxrwx@ 1 somez staff 512 Feb 22 22:44 AppleBacklightInjector.kext

drwxrwxrwx@ 1 somez staff 512 Oct 6 2014 AppleHDA_20672.kext

drwxrwxrwx@ 1 somez staff 512 Aug 13 2016 BlueTooth_Injector_T420.kext

drwxrwxrwx@ 1 somez staff 512 Dec 20 05:27 FakeSMC.kext

drwxrwxrwx@ 1 somez staff 512 Aug 29 2009 IOAHCIBlockStorageInjector.kext

drwxrwxrwx@ 1 somez staff 512 Jul 11 2016 IntelBacklight.kext

drwxrwxrwx@ 1 somez staff 512 Sep 23 2016 IntelMausiEthernet.kext

drwxrwxrwx@ 1 somez staff 512 Mar 30 16:50 VoodooPS2Controller.kext

tluck · May 22, 2017

1) if you are on 10.12.4 or later, remove all occurrences of IntelBacklight.kext - in ESP and OS /L/E

2) the symbolic link is within the kext structure - it is how AppleHDA_20672 works - the MacOS binary executable is a symbolic link to the origin AppleHDA.kext

$ ls -l CLOVER/kexts/Other/AppleHDA_20672.kext/Contents/MacOS/

total 8
lrwxr-xr-x 1 root wheel 64 Nov 9 2015 AppleHDA -> /System/Library/Extensions/AppleHDA.kext/Contents/MacOS/AppleHDA

Somez · May 22, 2017

1) if you are on 10.12.4 or later, remove all occurrences of IntelBacklight.kext - in ESP and OS /L/E

2) the symbolic link is within the kext structure - it is how AppleHDA_20672 works - the MacOS binary executable is a symbolic link to the origin AppleHDA.kext

$ ls -l CLOVER/kexts/Other/AppleHDA_20672.kext/Contents/MacOS/

total 8

lrwxr-xr-x 1 root wheel 64 Nov 9 2015 AppleHDA -> /System/Library/Extensions/AppleHDA.kext/Contents/MacOS/AppleHDA

I've removed all IntelBacklight.kext files and my machine is still working fine

Thanks tluck.

avdo · May 23, 2017

@tluck

I followed this guide in the early days and successfully installed Yosemite 10.10.5 on my X220.

I'm about to take receipt of a T420 ( My eyes are getting worse for the small display) and was wondering that the current bundled DSDT will be backwards compatible with Yosemite. The T420 is the same model as yours, HD3000 only with a 1600x900 display.

~~Don't feel the need to upgrade to Sierra or El Capitan as Yosemite and overall reliability / performance has been rock solid.~~

Sorry, further reading indicates that for support i'd be better with Sierra. Off to the app store then....

Many Thanks

avdo

tluck · May 23, 2017

@avdo - the current DSDT is compatible. you should be able to use the x220 disk or clone it (just change the ESP files - like DSDT). but an upgrade to sierra is not a bad idea either.

trifero · May 24, 2017

It´s a bit of time that I dont visit the site as muchas before, But I read the mails.

Theres something I have been thinking last months….

The T420, and so the X220 worked like a charm when I stoped visiting.

There was no reason. Everything worked perfect. Really I believe its the best hackintosh i have had.

In some aspect, even better than a Macbook

But Now there are so many mails with bugs and problems.

And if I´m not wrong, started when the clover was updated

My question: my T420, now in the hand of my sister keeps his perfect lack of problems.

By the way, in a few weeks she will update the computer. Maybe someone interested?

16GB RAM, Screen 1600x900 2 SSD´s , that i can change to be cheaper.

Also have a USB 3.0 card,

¿WHY UPDATE????

tluck · May 24, 2017

well sure blame me! I strive to keep this zip up to date and working. sorry if it broke someones system. Recently, i moved to GitHub for the zip to keep a history of releases. so folks have options.

why update? There are some changes in macOS that requires a newer Clover. but some then some changes in Clover after 4052 to simplifly things for the GFX config seems to backfire.

but also note some of the recent posts have been for people changing to FHD screen.

* which are out of scope for my standard guide* - The zip and guide support the T420 for standard LCD - 1366x768 or 1600x900. Anything beyond this laptop, is going to require some extra tweaking or retrofit.

Lenovo ThinkPad T420 with UEFI Only

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