Notas - macOS

Notas para usar la imagen de OpenCore

Hardware soportado:

Category Description

Model         Lenovo ThinkPad T490

Variant         20N3

BIOS         UEFI: v1.81 (2023-10-26)

Embedded Controller: v1.27

CPU         Intel Intel Core i5 8265U (Quad Core)

RAM         16 GB

Storage         Samsung PM981 NVMe (unusable)

                1000 GB M.2 KINGSTON SNV2S1000G

Display Full HD (1080p) (Non-Touch)

iGPU         Intel(R) Grpahics UHD 620 (spoofed as Iris 655, BusID: 2)

dGPU         None

Audio         Realtek ALC257 (using Layout 97)

Thunderbolt Titan Ridge Thunderbolt 3 Connector (USB-C)

Ethernet Intel I219-V

WiFi         Intel AC-9560

Firmware:       iwm-9000-46

Bluetooth Device: Intel Wireless Bluetooth

                VID: 0x8087, PID: 0x0aaa

                Firmware: ibt-17-16-1.sfi, ibt17-16-1.ddc

USB Port: HS10

Trackpad Synaptics

Device-id:      pci8086,9de8. Controlled via SMBus.

SD Card Reader Realtek MicroSD Card Reader

Dock         ThinkPad Ultra Docking Station

Configuración BIOS 

Shared Display Priority: HDMI

Total Graphics Memory: 256 MB

Intel Hyperthreading Technology: ON

Security Fingerprint

Predesktop Authentication: OFF

Security Chip

Security ChipON or OFF (enable for Windows 11)

Memory Protection

Execution Prevention: ON

Kernel DMA Protection: ON (enables VT-D by design)

I/O Port Access

Ethernet LAN: ON

Wireless LAN: ON

Bluetooth: ON

USB Port: ON

Memory Card Slot: ON

Smart Card Slot: OFF

Integrated Camera: ON

Integrated Audio: ON

Microphone: ON

Fingerprint Reader: OFF

Thunderbolt 3: ON

Absolute Persistance Module Activation: Disabled

Secure Boot: OFF

Intel SGX

Intel SGX Control: Disabled

UEFI/ Legacy Boot: UEFI Only

Boot Mode: Quick (Skips Diagnostics)

Open the config.plist with a plist editor (e.g. ProperTree or OCAT) and adjust the following settings based on the used version of macOS and personal preferences:

Graphics

Devices/Properties/Add/PciRoot(0x0)/Pci(0x2,0x0)

If you plan to install macOS 13.3 or older, disable/delete enable-backlight-registers-alternative-fix and use enable-backlight-registers-fix instead to fix black screen issues.

If other issues occur, try the other framebuffer patch in the config (the one that's disable by #)!

An additional list of Framebuffer Patches can be found here

Wi-Fi: Decide, which Wi-Fi kext you want to use (→ see AirportItlwm vs itlwm). AirportItlwm is enabled by default.

Kernel/Quirks:

AppleXcpmCfgLock is not required on my system. Try for yourself if your T490 can boot without it.

NVRAM/Add/7C436110-AB2A-4BBB-A880-FE41995C9F82

Optional: add boot-args -v, debug=0x100 and keepsyms=1 for debugging if you face issues.

UEFI/APFS

Change MinVersion and MinDate to -1 if you want to run macOS Catalina or older.

Platforminfo/Generic: SMBIOS

Generate MLB, Serial and ROM for MacBookPro15,2 using GenSMBIOS or OCAT.

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