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lukakeiton

[GUIDE] Acer Aspire 7750g

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Hi everyone! If you have red my Catalina post, you realised it is not a good enough project, so I decided to install High Sierra (10.13.6).

Laptop: Acer Aspire 7750g

Specs:

  • CPU: Intel Core i7 2670-QM
  • RAM: 8GB DDR3 1333MHz
  • iGPU: Intel HD 3000
  • dGPU: AMD Radeon HD 6650M 2GB
  • LCD: 17,3"
  • SMBIOS: MacBookPro 8,3
  • WIFI/BT: Broadcom BCM94352HMB
  • SSD1: 512 GB
  • SSD2: 480GB
  • DVD-RAM/¬ĪR/¬ĪRW
  • Atheros Gigabit Ethernet

Notes:

  1. PowerButton must be pressed for 3 seconds, then the menu shows up.
  2. Microphone and speakers are working
  3. SD Card Reader works
  4. All Fn+Key combinations work
  5. Battery percentage showed correctly
  6. HandOff, Continuity and the rest of features work
  7. Sleep works

Creating EFI folder

Step 1: Kexts and Drivers folders

Download OpenCorePkg last release (I use OC 0.6.7 in this guide). Also download these kexts:

  1. Lilu
  2. VirtualSMC (and SMCProcessor and SMCBatteryManager)
  3. AppleALC
  4. WhatEverGreen
  5. VoodooPS2Controller
  6. AtherosL1cEthernet
  7. BrcmPatchRAM (BrcmFirmwareData and BrcmPatchRAM2)
  8. AirportBrcmFixup
  9. mXHCD

Copy all of them to Kexts folder. Also download AptioInputFix.efi file and copy it to Drivers folder.

Note: HfsPlusLegacy.efi not used, OpenHfsPlus.efi instead.

Step 2: ACPI folder

Step 3: Preparing config.plist

Follow Dortania's OpenCore Install Guide for Sandy Bridge Laptop.

https://dortania.github.io/OpenCore-Install-Guide/

Renames needed:

  • _Q11 to XQ11¬†(FNKeys)
  • _Q12 to XQ12 (FNKeys)
  • Rename _BIF to XBIF (BAT0)
  • Rename _BST to XBST BAT0
  • Rename FANG to XANG (BAT0)
  • Rename FANW to XANW (BAT0)

To activate sound, inject 27 layout through DeviceProperties

AMD Radeon HD 6650M 2GB

Once you arrive at this point, you should have a proper working machine with fully working Intel HD 3000. However, what happens with AMD GPU? HDMI and VGA DO NOT WORK.

Windows tasks:

Follow installation part from Catalina's guide for installing modded BIOS: 

 

EXTRACT VBIOS.ROM

Thanks to MrTrucker:

https://www.insanelymac.com/forum/topic/277042-amd-radeon-hd-6650m-graphics-enabler-dsdt-hdmi-audio-acer-aspire-7750g-2674g50mnkk-gradients-fixed/?do=findComment&comment=1845018

Once you have VBIOS.rom file, download rom_dsdt_converter.zip and extract it. Then, open cmd, drop rom_dsdt_converter.exe to cmd, type a space and drop VBIOS.rom to cmd. Press Enter and a txt file is created. Open it and delete all "0x" using find and replace. Place txt file to a FAT32 USB and reboot on macOS.

macOS tasks:

Open IORegistryExplorer and look for "display0" inside "IGPU" device (if you don't use whatevergreen kext, device name is GFX0). Click on child AppleBackLightDisplay, look for IODisplayEDID Value content. We need this.

Open you config.plist with a plist editor. Add a new child on DeviceProperties->Add. Select Dictionary class and set key as "PciRoot(0x0)/Pci(0x1,0x0)/Pci(0x0,0x0)".

Add following children: (Key | Class | Value)

  • @0,compatible | String | ATY,Ipomoea
  • @0,device_type | String | display
  • @0,display-dual-link | Data |¬†01000000
  • @0,display-type | String | LCD
  • @0,name | String |¬†ATY,Ipomoea
  • @1,compatible | String | ATY,Ipomoea
  • @1,connector-type | Data |¬†00080000
  • @1,device_type | String | display
  • @1,display-type | String | None
  • @1,name | String |¬†ATY,Ipomoea
  • @2,compatible | String | ATY,Ipomoea
  • @2,connector-type | Data |¬†10000000
  • @2,device_type | String | display
  • @2,display-type | String | None
  • @2,name | String |¬†ATY,Ipomoea
  • AAPL,slot-name | String | Slot-1
  • AAPL00,DualLink | Data |¬†01000000
  • AAPL00,override-no-connect | Data | "Paste your IODisplayEDID Value from IORegistryExplorer here without quotes"
  • ATY,bin_image | Data | "Paste your txt content here without quotes"
  • VRAM,totalsize | Data |¬†00000080
  • device-id | Data |¬†41670000
  • device_type | String |¬†ATY,IpomoeaParent
  • hda-gfx | String | onboard-1
  • model | String |¬†AMD Radeon HD 6650M 2GB
  • name | String |¬†ATY,IpomoeaParent

Go to Kernel->Patch->Add and add three new children as Dictionary.

First child:

  • Arch | String |¬†x86_64
  • Comment | String |¬†AMD Connector Screen
  • Count | Number | 0
  • Enabled | Boolean | YES
  • Find | Data |¬†00040000 04030000 00010000 00000000 12040105 00000000
  • Identifier | String |¬†com.apple.kext.AMD6000Controller
  • Limit | Number | 0
  • Mask | Data |
  • MaxKernerl | String |
  • MinKernel | String | 16.0.0
  • Replace | Data |¬†02000000 40000000 00010000 00000000 10010003 00000000
  • ReplaceMask | Data |
  • Skip | Data |

Second child:

  • Arch | String |¬†x86_64
  • Comment | String |¬†AMD Connector HDMI
  • Count | Number | 0
  • Enabled | Boolean | YES
  • Find | Data |¬†00080000 04020000 00010000 00000000 11020403 00000000
  • Identifier | String |¬†com.apple.kext.AMD6000Controller
  • Limit | Number | 0
  • Mask | Data |
  • MaxKernerl | String |
  • MinKernel | String | 16.0.0
  • Replace | Data |¬†00080000 00020000 00010000 00000000 11020101 00000000
  • ReplaceMask | Data |
  • Skip | Data |

Last child:

  • Arch | String |¬†x86_64
  • Comment | String |¬†AMD Connector VGA
  • Count | Number | 0
  • Enabled | Boolean | YES
  • Find | Data |¬†10000000 10000000 00010000 00000000 00000002 00000000
  • Identifier | String |¬†com.apple.kext.AMD6000Controller
  • Limit | Number | 0
  • Mask | Data |
  • MaxKernerl | String |
  • MinKernel | String | 16.0.0
  • Replace | Data |¬†10000000 10000000 00010000 00000000 00000205 00000000
  • ReplaceMask | Data |
  • Skip | Data |

Reboot the computer. Now, if you go to Screen Preferences you can select the screen with specific GPU.

Manual switch of graphic cards video

SSDT-PowerButton.aml

Edited by lukakeiton
  • Like 1

AMD Ryzen 9 3900X

ASUS ROG STRIX X570-E GAMING

Sapphire Nitro+ Radeon RX 590 8GB

CORSAIR Vengeance LPX 32GB DDR4 3600Mhz

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Why switchable graphics DO NOT work?

All MacBookAir and MacBookPro with switchable graphics have a mux chip, changing iGPU to dGPU (or viceversa). Both GC are connected to LVDS directly. However, this laptop has no mux chip, so we CAN'T emulate the behaviour of this chip. If we fake it, it simply does not work. In addition, dGPU of this laptop is connected to iGPU (instead of LVDS connector), that's why we can activate LVDS for dGPU WITHOUT disabling iGPU.

The original ACPI code for this chip under _SB.PCI0.LPCB path is:

Device (GMUX)
                {
                    Name (_HID, EisaId ("APP000B"))
                    Name (_CID, "gmux")
                    Name (_STA, 0x0B)
                    Name (_CRS, ResourceTemplate ()
                    {
                        IO (Decode16,
                            0x0700,             // Range Minimum
                            0x07FF,             // Range Maximum
                            0x01,               // Alignment
                            0xFF,               // Length
                            )
                    })
                    Name (_PRW, Package (0x02)
                    {
                        0x15, 
                        0x03
                    })
                    Scope (\_GPE)
                    {
                        Method (_L35, 0, NotSerialized)
                        {
                            Notify (\_SB.PCI0.LPCB.GMUX, 0x80)
                        }
                    }

                    Method (_PSW, 1, NotSerialized)
                    {
                        If (Arg0)
                        {
                            And (\GP22, 0xFB, \GP22)
                        }
                        Else
                        {
                            Or (\GP22, 0x04, \GP22)
                        }
                    }

                    Name (GMGP, 0x35)
                    Method (GMLV, 0, NotSerialized)
                    {
                        Return (GP22)
                    }
                }

In case you have "Name (_HID, EisaId ("APP000B"))" reference on your DSDT, switchable graphics MAY work.

Dual Boot: MacOS and Windows

ACPI BIOS Error is most probable error you are going to find. This error is due to renames on DSDT, i.e. battery patch. I am preparing a full DSDT solution for dual boot, based on OSYS variable.

The main problem I am facing is defining OperationRegions in BAT0 device depending of OSYS value. When the work is finished, I will publish it.

PS: Other solution is pressing F12 when power up and select windows partition, not using OpenCore to boot windows.

 

Edited by lukakeiton

AMD Ryzen 9 3900X

ASUS ROG STRIX X570-E GAMING

Sapphire Nitro+ Radeon RX 590 8GB

CORSAIR Vengeance LPX 32GB DDR4 3600Mhz

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Share on other sites

Hi again!

I have made some changes to this project and finally it is fully working.

Changes:

  • Update OC to 0.7.5
  • Switch to FakeSMC
  • No battery SSDT needed
  • Dual boot with MacOS High Sierra and Windows 10

Creating EFI folder

Step 1: Kexts and Drivers folders

Download OpenCorePkg last release. Also download these kexts:

  1. Lilu
  2. FakeSMC (and FakeSMC plugins)
  3. AppleALC
  4. WhatEverGreen
  5. VoodooPS2Controller
  6. AtherosL1cEthernet
  7. BrcmPatchRAM (BrcmFirmwareData and BrcmPatchRAM2)
  8. AirportBrcmFixup
  9. mXHCD
  10. ACPIBatteryManager
  11. BrightnessKeys
  12. ECEnabler
  13. USBMapLegacy

Copy all of them to Kexts folder. Also download AptioInputFix.efi file and copy it to Drivers folder.

Note: HfsPlus.efi not used, HfsPlusLegacy.efi instead.

Step 2: ACPI folder

  • SSDT-EC.aml (Create an EC device, preserves EC0 device)
  • SSDT-FNKeys.aml (_Q11 and _Q12 methods for brightness keys map)¬†https://www.olarila.com/applications/core/interface/file/attachment.php?id=32541
  • SSDT-HPET.aml (Corrected IRQ flags) (You will¬†create later)
  • SSDT-IMEI-S.aml (Fake IMEI device)¬†(You will¬†create later)
  • SSDT-PM.aml (TurboBoost CPU)¬†(You will¬†create later)
  • SSDT-PNLF.aml (For brightness)¬†(You will¬†create later)
  • SSDT-SBUS-MCHC.aml (Fake SBUS device)
  • SSDT-XOSI.aml

Step 3: Preparing config.plist

Follow Dortania's OpenCore Install Guide for Sandy Bridge Laptop.

https://dortania.github.io/OpenCore-Install-Guide/

Renames needed:

  • HPET _CRS to XCRS Rename
  • RTC IRQ 8 Patch
  • TIMR IRQ 0 Patch
  • EHC1 to EH01
  • EHC2 to EH02
  • _Q11 to XQ11¬†(FNKeys)
  • _Q12 to XQ12 (FNKeys)

To activate sound, inject 12 layout through DeviceProperties.

Add Windows 10 entry to OC

Press space on picker screen in OC and select OpenShell.efi

Take a screenshoot of your screen (you should see multiple FSX, where X is a number) Type "FSX:" (where X is the number of Microsoft EFI partition). A fast discover is typing "cd EFI/Microsoft", if it exists you have the correct number.

Once you have the correct number, go to MacOS, go to Misc->Entries in config.plist and set your correct path. Save and reboot.

Note: Remember to set your serial and the rest in PlatformInfo->Generic

DOWNLOAD EFI

AMD Ryzen 9 3900X

ASUS ROG STRIX X570-E GAMING

Sapphire Nitro+ Radeon RX 590 8GB

CORSAIR Vengeance LPX 32GB DDR4 3600Mhz

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