• To install macOS follow the guides provided by Dortania

• Useful tools by CorpNewt and headkaze

Security

• Security Chip Disabled
• Memory Protection -> Execution Prevention Enabled
• Virtualization -> Intel Virtualization Technology Enabled
• Virtualization -> Intel VT-d Feature Enabled
• Anti-Theft -> Computrace -> Current Setting Disabled
• Secure Boot -> Secure Boot Disabled
• Intel SGX -> Intel SGX Control Disabled
• I/O Port Access -> Thunderbolt Disabled
• Device Guard Disabled

Startup

• UEFI/Legacy Boot UEFI Only
• CSM Support No

Important: Thunderbolt

• Thunderbolt BIOS Assist Mode Disabled
• Wake by Thunderbolt(TM) 3 Disabled
• Security Level No Security
• Support in Pre Boot Environment -> Thunderbolt(TM) device Enabled

Either add as a string or as a data ( HEX data (ProperTree) )

Format is lang-COUNTRY:keyboard

• 🇺🇸 | [0] en_US - U.S --> en-US:0 --> 656e2d55 533a30

etc.

AppleKeyboardLayouts.txt

1. Set Secure Boot to Setup Mode. Secure Boot should be reported as off by UEFI main tab
2. Create FAT32 formatted USB
3. Create EFI folder in the root of the newly formatted flash drive and move there content of SecureBoot/KeyTool
4. Boot flash drive via F12 boot menu
5. Choose Edit keys

6. Start by replacing Signature Database. Select .auth file

7. Do the same for Key Exchange Keys Database (KEK) and Platform Key (PK) in this order
8. Exit and shutdown your machine
9. Boot into the UEFI settings and check if Secure Boot is reported as on
10. Boot you favorite OS with Secure Boot enabled

More detailed information here

! Still quite experimental

If you encounter some serious colour banding issues ( Keep in mind that T480 1080p stock panel colour accuracy is not really good, cca 50-60% sRGB), your only solution is to replace GPU properties as bellow or replace the stock panel with one from T490 (400 nits, Low power).

<key>AAPL,ig-platform-id</key>
<data>AAAWGQ==</data>
<key>device-id</key>
<data>FhkAAA==</data>
</dict>

Do not use these any additional boot arguments! Get custom WhateverGreen version instead from Other folder

You can check your screen in gradient test here or just by simple look at Launchpad background.

GenSMBIOS

For the sake of future-proof updates, please use MacBookAir9,1 (MBA 13 Intel 2020). Otherwise edit USB Map files.

Generate CPUFriendDataProvider for your machine here or use at your own risk files provided in the Other folder.

• Battery percentage

• Broadcom Bluetooth - All works! (native)

• Boot chime

• Boot menu OpenCanopy

• CPU power management / performance Now on par with Windows without XTU undervolt.

• FireVault 2 No config.plist changes needed

• GPU UHD 620 hardware acceleration / performance

• HDMI Closed lid. With audio.

• USB-C Outputs Both USB-C ports works independently of Thunderbolt status (Non-TB3 EFI only supports DP through the upper port).

• iMessage, FaceTime, App Store, iTunes Store. Generate your own SMBIOS

• Intel I219V Ethernet port Full 1 Gbps speeds and external eithernet adapter next to TB port also works

• Keyboard Volume and brightness hotkeys. Another media keys with YogaSMC.

• Microphone With keyboard switch using YogaSMC.

• Realtek® ALC3287 ("ALC257") Audio

• SD card reader Fortunately, USB connected.

• Sidecar wired Works with 15,2 SMBIOS. Wireless with Broadcom Card

• Sleep/Wake Hibernatemode 25 for the best results.

• Thunderbolt 40 Gbps, cold boot only

• TouchPad 1-5 fingers swipe works. Emulate force touch using longer and more voluminous touch.

• TrackPoint Works perfectly. Edited kext Info.plist for more precise acceleration.

• USB Ports USB Map is different for devices with Windows Hello camera.

• Web camera Works well with MacOS with no bugs

• Broadcom Wifi - For native Broadcom cards disable kext patches. 14.0+ use OCLP.

• DRM Widevine, validated on Firefox 82. WhateverGreen's DRM is broken on Big Sur

• Thunderbolt Sleep/Wake Thunderbolt needs a cold boot to be enabled. If you enter a sleep/wake cycle you will need to shutdown and cold boot again.

• 4K Output USB-C currently can only support output up to 2K.

Note that if you perform the skyra1n mod for your laptop's BIOS, it is possible to adjust the DVMT from the default 32MB to 64MB, making it possible to disable DVMT patches in DeviceProperties and fix 4K internal/external display output issues. Similarly and less documented previously, by enabling GPIO3 Force Pwr and GPIO3 Force Pwr for RP05, you could at least enable Thunderbolt hot reboot functionality, meaning that you do not need to perform a full shutdown and boot cycle to regain Thunderbolt functionality after a Sleep/Wake cycle. While less ideal than a full-fledged Sleep/Wake compatible hotswap functionality, this should be the best solution before further fixing the SSDT.

• Fingerprint

• Windows Hello IR Camera

• Smart Card Reader

It's possible to unlock Advanced menu thus disable CFG Lock natively in UEFI + Other Advanced menu benefits. SPI Programmer CH341a is required

T480 consuming 60w (~85w total) - unlimited TDP : thinkpad

ThinkPad discord

For Thunderbolt support please download the EFI folder. This one is based on pierpaolodimarzo's EFI config.

For non-Thunderbolt support please download the zip file. This one is based on valnoxy's EFI config. One notably benefit of using this EFI instead of valnoxy's one is that their config contains a rather long and redundant kext injection list.

Note that the non-TB config is no longer maintained. You will lose TB port DP output as well as 40Gb TB3 support, but you will gain better battery life. Both should boot macOS Sonoma equally well.