This repo contains the installation guide and EFI files required to get a perfectly functional Catalina 10.15.7 hackintosh on your t450. Everything is stable and functional as described in this Readme

This is an update for Echo's repo. OC has been updated to 0.6.2 and all the kexts are updated to the lastet version to date. I did make some QOL changes for it. I'll try to keep the repo updated following major OC releases.

Issues (with OC 0.6.2):

None (Please use the EFI and report back!)

Changes I made:

Using VoodooRMI instead of VoodooPS2Trackpad for Touchpad/Trackpoint. I've found this to be leagues better in terms of smoothness and gestures
Disabled SSDT-SMBU and SSDT-Thinkpad_Clickpad patch for VoodooRMI compatibility. Also the clickpad patch didn't work for newer OC versions
Switched to Vanilla OC instead of the modified one
Added OpenCanopy support and Mac-like boot GUI
Switched to MacBooPro12,1 SMBIOS and tweaked Power Management for better battery life. By switching we lose Wired Sidecar but it was very laggy and often unuseable, but we gained much better power management, thus, better battery life. If you want Sidecar, you can switch back to Macbook9,1

Note: This is a fairly vanilla EFI. If you have Intel WiFi/BT Card, use OpenIntelWireless for WiFi/Bluetooth

Big Sur Screenshot (Running Dev Beta 9):

Original Readme from Echo:

Thinkpad T450s Catalina

Notice: If you need to edit config.plist, don't use OpenCore configurator, use PlistEdit pro or Xcode instead.

Introduction

efi for Thinkpad T450s (20BXCT01WW) Hackintosh Catalina.

CPU: i5-5200U

Integrated Graphics: HD Graphics 5500

Sound Card: ALC292

Wireless Card: DW1820A 00JT494

Bios

Security -> Security Chip: Disabled;
Memory Protection -> Execution Prevention: Enabled;
Virtualization -> Intel Virtualization Technology: Enabled;
Internal Device Access -> Bottom Cover Tamper Detection: must be Disabled;
Anti-Theft -> Current Setting: Disabled;
Anti-Theft -> Computrace -> Current Setting: Disabled;
Secure Boot -> Secure Boot: Disabled;
UEFI/Legacy Boot: UEFI Only;
CSM Support: Yes.

What works

Sleep / Wake
Wifi and Bluetooth (DW1820A)
Handoff, Continuity, AirDrop
iMessage, FaceTime, App Store, iTunes Store (Change Config.plist -> PlatformInfo -> Generic -> MLB and SystemSerialNumber)
Ethernet
Onboard audio (Use alc_fix to fix unworking jack after replug )
USB 2.0 / USB 3.0
Battery
Touchpad
Redpoint
miniDP
SD Card Reader (Thanks to @willmav5000)
Use one-key-hidpi to enable HiDPI
If you are using a usb mouse with side buttons, you can spoof apple usb mouse by change the pid and vid in AnyAppleUSBMouse.kext/Info.plist and enable it in config.plist.

What doesn't work

VGA
Sidecar (Wired Sidecar works but only in Macbook9,1 SMBIOS, which has bad battery life, you can choose what you want)