Alec M Posted January 31, 2017 Share Posted January 31, 2017 I have the same problem I have a weird bug I have noticed, and it only happens when Mac OS X is installed in the hard drive. I get a message 2 out of 3 times I boot or restart the computer... 0251- CMOS bad checksum error - Default configuration used After I press Esc then the computer resets the BIOS and successfully boots Clover from the GUID disk. 2 Link to comment Share on other sites More sharing options...
kosakgroove Posted January 31, 2017 Author Share Posted January 31, 2017 I have the same problem This seems to have fixed the problem! Install latest Clover, 3994, and replace the files with these r3994 fix.zip Link to comment Share on other sites More sharing options...
Alec M Posted February 3, 2017 Share Posted February 3, 2017 Are you using IntelBacklight kext? I'm using the kexts you provided in the first post. Link to comment Share on other sites More sharing options...
nicolobahr Posted April 1, 2017 Share Posted April 1, 2017 Hey! Thanks for the guide! especially the fan speed hack L420 is my first hackbook and boy was it a roller coaster. Installed Sierra successfully. I have a few minor problems for which I'd be extremely grateful if resolved. 1. I also have a renesas usb 3.0 express-card but its not working. When I attach a usb, nothing happens. The card shows up on the top bar as a usb controller. Do I have to do something extra?2. Can I get the volume buttons working somehow?3. You mentioned a way to get the vga working. I could not understand where to find AppleIntelSNBGraphicsFB and replace the string how? You also mentioned a method to add "adding a DSM to the IGPU device in DSDT". I could not find the IGPU device in DSDT so I could not add it. 4. Is replacing the hardware/usb-wifi the only way to get the wifi working? 5. Sometimes trackpad and keyboard freeze on boot (usb keyboard/mouse works fine). Will your custom kext ApplePS2SmartTouchPad kosakgroove.kext.zip solve the problem? 6. Speakers work but mic does not. Usb mic works ok. Could you help me? 7. After I put it to sleep, it immediately wakes up after sleeping for 2 seconds or so. Have you encountered something similar? Thanks Link to comment Share on other sites More sharing options...
tluck Posted April 2, 2017 Share Posted April 2, 2017 @nicolobahr i don't have a L420 - but T420 which has a lot in common. see the T420 Guide and thread for more ideas and fixes you may want. 1) PCI USB - check out mXHCI.kext (link in T420 thread) 2) can't help you with Audio 3) see T420 config.plist for patches to enable VGA port 4) intel wifi chips will not work period. so replace chip or use USB wifi. 5) trackpad - i use VoodooPS2trackpad - but its up to you see what works best. 6) see 2. 7) sleep not working is often from a USB issue. need to look at logs and check on EHC1/EHC2 DSDT mods. 1 Link to comment Share on other sites More sharing options...
nicolobahr Posted April 3, 2017 Share Posted April 3, 2017 @tluck Thanks for the help buddy!I did try the vga patch from your config.plist 1366x768 for vga. It did not work. I'll give up on it if I don't get any more ideas. Regarding the sporadically unresponsive keyboard/mouse issue, I'm also using VoodooPS2Controller. I have no fix for the mic issue either. Finally got PCI-E USB3.0 expresscard to work on 10.12.4. So happy! Here are the 2 things I used: 1. The driver 2. The kext Link to comment Share on other sites More sharing options...
nicolobahr Posted May 12, 2017 Share Posted May 12, 2017 Hello fellow Hackintoshers I come to present my full guide on how to install Mac OS X 10.11 El Capitan on any Lenovo Thinkpad L420. I understand this is not a highly popular laptop outside corporations, I don’t even know if it was ever sold to the general public, so I guess this post will help me know that hahah anyway a friend of mine gave me two of them, one with i5 another with i3. This tutorial applies to any of those models. It should also apply to older versions of Mac OS X all the way until Snow Leopard (little modifications required as well as appropriate kexts) First, screenshot proof of beautiful functionality Captura de pantalla 2017-01-18 a las 17.52.34.png What is working WiFi , Bluetooth, Airdrop (Wifi replaced with Atheros AR9285) Full QE/CI acceleration with integrated Intel HD3000 graphics Trackpad with 1 finger , 2 finger and 3 finger gestures keyboard as well as function keys (brightness, volume) Battery percentage Sleep, Shutdown and Reboot Sound working on ALC269 mobile DVD Drive DisplayPort audio and video VGA out USB 3.0 ExpressCard (Renesas) iMessage and Facetime Recovery Partition What is not working You tell me Install bootloader (Clover) to El Capitan USB install media You should select your USB in the Clover installer and then hit “Customize” Select the next options: Install Clover in the ESP Install boot0ss in MBR Clover EFI 64bits SATA CSMVideoDxe-64 EmuVariableUEFI-64 OsxAptioFix2Drv-64 Fat64 Configuring the bootloader After installation is complete, the EFI partition we want to configure will already be mounted, so we proceed to open it and do the following Install HFSPlus.efi and NTFS.efi in drivers64UEFI folder and remove VboxHFS.efiOpen the folder /EFI/Clover/kexts and delete all the folders starting by 10 and leave only the “other” folderIn the above mentioned “other” folder place the kexts that I will quote next (you can download the ones attached to the post, but I always recommend the latest versions) : ACPIBatteryManager.kext AppleALC.kext BroadcomBluetooth.kext CodecCommander.kext DisableTurboBoostBattery.kext FakePCIID_XHCIMux.kext FakePCIID.kext FakeSMC, HWInfo, IntelCPUMonitor (HwSensors3 from Slice) GenericUSBXHCI.kext (only if you use an USB3.0 ExpressCard) IntelBacklight.kext RealtekRTL8111.kext toledaARPT.kext (if you use Atheros AR9285) USBInjectAll.kext VoodooPS2Controller.kext ( tluck's version ) kextpack Lenovo L420 .zip After all the kexts are in the correct folder you should tweak your config.plist as follows, I recommend using Clover Configurator Captura de pantalla 2017-01-18 a las 17.41.30.png Captura de pantalla 2017-01-18 a las 17.42.18.png Captura de pantalla 2017-01-18 a las 17.42.33.png Captura de pantalla 2017-01-18 a las 17.42.45.png Captura de pantalla 2017-01-18 a las 17.42.55.png Captura de pantalla 2017-01-18 a las 17.43.09.png Captura de pantalla 2017-01-18 a las 17.43.18.png Captura de pantalla 2017-01-18 a las 17.43.27.png Captura de pantalla 2017-01-18 a las 17.43.37.png Captura de pantalla 2017-01-18 a las 17.44.14.png Captura de pantalla 2017-01-18 a las 17.44.27.png Lenovo mostly whitelist the Wifi cards on their laptops (and some desktops) so you will have to use a custom BIOS for this. There is one here luckily. https://app.box.com/s/j4fffsagyzlohxmnvq6t If you need me to explain how to flash it then you shouldn’t really be Hackintoshing in the first place. After you have flashed the BIOS make sure you set the SATA controller to AHCI. You should be able to boot from the Clover USB and install Mac OS X Remember to use a GUID partition scheme for the drive you will use. Recovery partition should be generated automatically by the OS X installer. Enjoy your new HackBook PS: DSDT and SSDT patches tutorial for this specific laptop are on their way Hi, could you update the guide so that sleep issue does not occur? I could not understand the thread between you and rehabman. I too have to force restart the laptop everytime I put it to sleep. Thanks in advance. Link to comment Share on other sites More sharing options...
kosakgroove Posted May 18, 2017 Author Share Posted May 18, 2017 Hi, could you update the guide so that sleep issue does not occur? I could not understand the thread between you and rehabman. I too have to force restart the laptop everytime I put it to sleep. Thanks in advance. I am working on a new guide for our beloved Thinkpad L420 with macOS Sierra, which is running nicer than El Capitan for me and with less bugs. Stay tuned friend 1 Link to comment Share on other sites More sharing options...
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