Awesome

xz's Hackintosh profile on Thinkpad X1E

Hardware: Thinkpad X1 Extreme Gen 1

CPU: Core i7-8750H 2.2GHz
Memory: 16G 2667MHz DDR4
SSD1: SAMSUNG PM981 512 GB
SSD2: Intel 660P 1T NVMe
Display: 1080p, non-touch
Graphics: Intel UHD Graphics 630
Wireless: Intel Wireless-AC 9260
Sound card: Realtek ALC285
BIOS: v1.23
OS: OS X Mojave 10.14.6

Result

<img align="middle" src="https://github.com/xuzhao9/Thinkpad-X1E-Hackintosh/blob/master/screenshots/overview.png" alt="Overview" />

What works

Base OS
Sleep, wakeup, hibernation
Brightness, function keys for brightness control, NightShift
Intel Ethernet LAN (mini RJ45)
Touchpad and TrackPoint
Audio, function keys for volume control, headphone jack
USB 3.1 ports

What doesn't work

Function keys Fn+F7-F12
Intel Wireless and Bluetooth
Smooth brightness adjustment
SSD1: SamSung PM981 512GB
Nvidia Graphics Card 1050Ti
Thunderbolt 3 ports
HDMI output to external display

Add-ons

USB Wifi Dongle 1200M 802.11ac This model requires the Realtek 8811AU driver, which works on Mojave but not on Catalina. If you want to use Catalina with this USB dongle, try Chris1111's driver (Disclaimer: haven't tested).

DSDT and SSDT modifications

DSDT

I made my own DSDT.aml from the vanilla version.

Removed the two redundant lines of Oneto fix the compiling error.
Applied the RehabMan/ThinkPad X230i patch to fix battery indicator.
Fixed brightness function keys (Fn+F5/F6) by applying the _Q14 and _Q15 patch.

SSDT

Added SSDT_NVMe-Pcc.aml to disable the PM981 SSD1, which will cause the kernel panic unpredictably.

kext versions and modifications

AppleALC.kext v1.3.9

Set alcid=21 in E/C/config.plist. According to AppleALC support matrix, either layout 11 or layout 21 should work. However, sound card stops working unpredictably when using layout 11. Use layout 21 instead solves the problem.
FakeSMC.kext
Lilu.kext
NoTouchID.kext
USBInjectAll.kext
VoodooPS2Controller.kext
WhateverGreen.kext
L/E/ACPIbatterymanager.kext
L/E/Codeccommander.kext
L/E/HibernationFixup.kext
L/E/IntelMausiethernet.kext
L/E/XHCI-unsupported.kext

Misc

OS X is the only operating system on this machine. No dual boot.

Acknowledgements