Catalina or macos installation with OpenCore for Lenovo Y50-70

##For Big Sur please refear https://github.com/GeekyCoder7/OpenCore-EFI-Lenovo-Y50-70

OpenCore - post-installation: 0.6.1

Specs:

• Intel Core i7-4710HQ -- Product Page
• Intel HD4600 iGPU
• Nvidia GTX 860M 4GB (unsupported)
• 16GB DDR3 Ram
• Realtek RTL8723BE Wifi Card - Replaced with a Broadcom BCM43xx WiFi Card
• Replacing the WiFi Card needs a modified BIOS due to Blacklisting non-OEM Cards

What you need:

• Lenovo Y50-70 (or Y70 Haswell) with either 1080p or UHD/4K display
• macOS or OS X downloaded from the Mac App Store
• 8GB USB stick with EFI folder pre-installation on EFI Partition and MacOSX installation.
• Broadcom BCM94352Z for native WiFi (Lenovo FRU: 04X6020, Lenovo PN: 20-200480) or MacOS Broadcom compatible model with BIOS unlock.

What works:

Expect to work:

• built-in keyboard (with brightness keys)
• built-in trackpad (multi gestures)
• HDMI video/audio with hotplug
• AirPlay mirroring to AppleTV
• native WiFi via BCM94352Z
• Bluetooth (with handoff) using BCM94352Z
• native USB3
• native audio with AppleHDA
• built-in mic
• built-in camera
• native power management
• battery status
• backlight controls with smooth transitions, save/restore across restart
• accelerated graphics for HD4600 including OpenCL
• wired Ethernet
• retina scaling (in the case of UHD screen)

Not working:

• Nvidia GTX 860M 4GB (It doesn't work and it will never work)
• card reader

BIOS settings:

To start, set BIOS to Windows 8 defaults.

Then insure:

• UEFI boot is enabled
• secure boot is disabled
• enable Legacy Boot (but UEFI first) and you may experience less boot time glitches

For the UHD model, the DVMT-prealloc BIOS setting must be changed to 128MB. One of two methods can be used:

• use a EFI shell to change the DVMT-prealloc from the shell.
• use a patched BIOS which unlocks the advanced menu

What you have to do:

• Install MacOS with pre-installation EFI

• copy EFI post-installation folder on EFI partition of your HD.

• Modify SMBIOS data with your information for imessage/facetime

(You have to import from your older configuration or generate a new one)

- Use MacSerial to generate your SMBIOS --[Macserial](https://github.com/acidanthera/OpenCorePkg/tree/master/Utilities/macserial)
- MacSerial Example in terminal macserial -a | grep -i iMac19,1

Output Example from above command:

• iMac19,1 | C02YC2Y1JV3Q | C02909403CDLNV9A8
• iMac19,1 | C02YX1Y9JV3Q | C02926401GULNV91H
• iMac19,1 | C02YN07JJV3Q | C02918207J9LNV91M
• iMac19,1 | C02YJKZTJV3Q | C029142004NLNV9A8
• iMac19,1 | C02Y6QY5JV3Q | C02905100CDLNV9FB
• iMac19,1 | C02Z4EY6JV3Q | C02930310GULNV98C
• iMac19,1 | C02Y1VY1JV3Q | C02853130GULNV91M
• iMac19,1 | C02ZL06PJV3Q | C029438024NLNV9JA
• iMac19,1 | C02YX072JV3Q | C02926500CDLNV9CB
• iMac19,1 | C02ZW3YFJV3Q | C02952301GULNV9UE

Generic:

SpoofVendor: YES (This prevents issues with having “Apple,inc” as manufacturer).
SystemUUID: Can be generated with MacSerial or use previous from Clover’s config.plist.
MLB: Can be generated with MacSerial or use previous from Clover’s config.plist.
ROM: <> (6 character MAC address, can be entirely random but should be unique).
SystemProductName: Can be generated with MacSerial or use previous from Clover’s config.plist.
SystemSerialNumber: Can be generated with MacSerial or use previous from Clover’s config.plist.

Data that you have to modify on Config.plist/Platforminfo/Generic with PlistEditorPro or other plist editor.

Post installation commands to do

• sudo pmset -a hibernatemode 0
• sudo rm /var/vm/sleepimage
• sudo mkdir /var/vm/sleepimage

HD PANEL ISSUE

Add to your config > DevicePropieties > PciRoot(0x0)/Pci(0x2,0x0)

• framebuffer-cursormem -> AACQAA==

• framebuffer-fbmem -> AACQAA==

• framebuffer-stolenmem -> AAAwAQ==

      Ex: <key>framebuffer-stolenmem</key>
    		      <data>
    		      AAAwAQ==
    		      </data>
  

NB: this values are in text editor format!

BigSur WIFI ISSUE

NB: this values are in text editor format!

Remove from config:

        <dict>
            <key>AAPL,slot-name</key>
            <string>WLAN</string>
            <key>compatible</key>
            <string>pci14e4,4353</string>
            <key>device_type</key>
            <string>Airport Extreme</string>
            <key>model</key>
            <string>DW1560 (BCM4352) 802.11ac Wireless</string>
            <key>name</key>
            <string>Airport</string>
        </dict>

Update AirportBRCMFixup.kext to latest version Remove AirPortBrcm4360_Injector.kext from plugins folder of AirportBRCMFixup kext and added entry

        <dict>
            <key>Arch</key>
            <string>Any</string>
            <key>BundlePath</key>
            <string>AirportBrcmFixup.kext/Contents/PlugIns/AirPortBrcmNIC_Injector.kext</string>
            <key>Comment</key>
            <string></string>
            <key>Enabled</key>
            <true/>
            <key>ExecutablePath</key>
            <string></string>
            <key>MaxKernel</key>
            <string></string>
            <key>MinKernel</key>
            <string></string>
            <key>PlistPath</key>
            <string>Contents/Info.plist</string>
        </dict>

Credits:

*Rehabman tonymacx86 forum

*Xsiry Github xsiry

*acidadanthera Github Acidanthera

*macos86.it Forum