这是一个求助文章!求大佬帮忙解惑!
求大佬提供一个4代的Opencore的EFI做下参考

型号:联想(Lenovo)拯救者 14.0英寸游戏本(i7-4720HQ 8G 128G SSD+1T GTX960M )
联想拯救者14黑苹果EFI
macOS Catalina 10.15.6 基本99%完美运行,声卡,调节亮点,蓝牙。
无线网卡无法驱动,需要换硬件,或者买个usb无线网卡
10.15正常使用的EFI分享:
https://download.csdn.net/download/lxyoucan/12799759
配置如下:

运行Catalina正常,然后我就手痒升级了,Big Sur升级一切顺利,正常进入桌面。使用后才发现,核显无法正常驱动。使用软件多的时候超级卡。

图形卡显示:
Intel HD Graphics 4600 7 MB
升级Big Sur使用的OpenCore,然后各种爬贴,尝试解决办法。我找的的教程基本都试了。(关于OC的相对较少)。完全跟教程一样,就是不成功。感觉技术不够折腾了两天没有成功,最终使用时间机器退回到了macOS Catalina10.15

诡异是事情就发生了,本来可以正常使用的Catalina 核显也驱动失败了。为了防止是EFI被什么软件修改了,我把EFI使用我之前备份的版本,还是不行。真是头大。可以保证EFI完全没变,系统没变,但是问题是依然显示7M。这就让我懵了。

最终解决办法

本来打算在重新安装一下,报着试试看的心里 Rest NVRAM
重启系统发现竟然神奇的好了。求大佬解惑,到底什么情况啊。原理不太明白。

猜想1:intel 核显驱动失败的人可以尝试Rest NVRAM

这一点我看到的帖子和文章,没人提到。

猜想2:我用的黑果小兵的镜像(clover+oc+pe版本),是不是我点了什么操作导致修改了 NVRAM

依据:
1.当我点击OC启动后,我的系统启动项就会被修改,会自动增加一个OpenCore启动项,到第一个启动顺序。
2.我点击了Rest NVRAM后,我的启动项就被还原了,只剩下硬盘了,没有EFI中的内容了(比如:OpenCore,Micsoft,Clover相关)

比如我用的clover在NVRAM中加了什么参数,导致我在OpenCore中使用Big Sur核显驱动不了,但是我如果重置NVRAM是否就可以了呢?

了解NVRAM

重置 Mac 上的 NVRAM 或 PRAM

如果 Mac 出现了与 NVRAM 或 PRAM 中储存的设置有关的问题,那么进行重置可能会有帮助。

NVRAM(非易失性随机访问存储器)是一小部分内存,Mac 使用这些内存来储存某些设置并对其进行快速访问。PRAM(参数 RAM)储存着类似的信息,且 NVRAM 和 PRAM 的重置步骤相同。

可储存在 NVRAM 中的设置包括音量、显示屏分辨率、启动磁盘选择、时区,以及最近的内核崩溃信息。储存在 NVRAM 中的设置取决于您的 Mac 以及与这台 Mac 搭配使用的设备。

如果您遇到与这些设置或其他设置有关的问题,那么重置 NVRAM 可能会有帮助。例如,如果 Mac 并非从“启动磁盘”偏好设置中选定的磁盘启动,或者在 Mac 启动前短暂地显示了一个问号图标,则可能需要重置 NVRAM。
来自:
https://support.apple.com/zh-cn/HT204063

通过上面可以理解,NVRAM是一个存储器,可以保存一些参数信息,说明我以前的理解是错误的,我误以为NVRAM就是保存在EFI分区中的数据。

2020年12月03日23:34:44

开心的事情:终于把核显驱动起来了!!!
比较懵的是:为啥可以驱动了?完全搞不清楚原因。
经过:
我爬了很多贴,官方的文章也看烂了。https://dortania.github.io/OpenCore-Install-Guide/config-laptop.plist/haswell.html#deviceproperties
就完全按照这个文档来驱动IGPU,我的OC配置完就是启动不起来。

后来我从github上找到一个HD4600机器的EFI,把核显配置这块COPY过来,和NVRAM修改了一下。重启直接就好了。

我对比了一下,核心内容都是一样的啊!!!我又把配置切换回我之前的写法,依然可以正常启动。

唯一的区别应该就是我加了禁用独显的参数

-wegnoegpu

2020年12月03日23:45:54
经测试加了这个参数,系统依然可以正常启动。这就让我很懵了。

为啥我之前任何配置都是正常的,REST NVRAM也做过了就是不行呢?

之前的故障原因,至今未知。

最终成功驱动的配置


config.plist分享一下。Big Sur成功安装使用!!!!不逼一下自己都不知道自己有多强。

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
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compatible controller</string><key>disable-external-gpu</key><data>AQAAAA==</data><key>enable-hdmi-dividers-fix</key><data>AQAAAA==</data><key>framebuffer-con0-alldata</key><data>AAASAAIAAAAwAAAAAQUSAAAIAACHAAAAAgASAAAIAABAAAAA</data><key>framebuffer-con0-enable</key><data>AQAAAA==</data><key>framebuffer-con2-alldata</key><data>AgQJAAAIAACHAAAA</data><key>framebuffer-con2-enable</key><data>AQAAAA==</data><key>framebuffer-cursormem</key><data>AACQAA==</data><key>framebuffer-fbmem</key><data>AACQAA==</data><key>framebuffer-memorycount</key><data>AgAAAA==</data><key>framebuffer-patch-enable</key><data>AQAAAA==</data><key>framebuffer-stolenmem</key><data>AAAwAQ==</data><key>framebuffer-unifiedmem</key><data>AAAAgA==</data><key>hda-gfx</key><string>onboard-1</string><key>model</key><string>Intel HD Graphics 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a><key>UIScale</key><data>AQ==</data></dict><key>4D1FDA02-38C7-4A6A-9CC6-4BCCA8B30102</key><dict><key>rtc-blacklist</key><data></data></dict><key>7C436110-AB2A-4BBB-A880-FE41995C9F82</key><dict><key>SystemAudioVolume</key><data>Rg==</data><key>boot-args</key><string>-v keepsyms=1 debug=0x100 agdpmod=vit9696</string><key>csr-active-config</key><data>AAAAAA==</data><key>prev-lang:kbd</key><string>en-US:0</string><key>run-efi-updater</key><string>No</string></dict></dict><key>Delete</key><dict><key>4D1EDE05-38C7-4A6A-9CC6-4BCCA8B38C14</key><array><string>UIScale</string><string>DefaultBackgroundColor</string></array><key>4D1FDA02-38C7-4A6A-9CC6-4BCCA8B30102</key><array><string>rtc-blacklist</string></array><key>7C436110-AB2A-4BBB-A880-FE41995C9F82</key><array><string>boot-args</string></array></dict><key>LegacyEnable</key><false/><key>LegacyOverwrite</key><false/><key>LegacySchema</key><dict><key>7C436110-AB2A-4BBB-A880-FE41995C9F82</key><array><string>EFILoginHiDPI</string><string>EFIBluetoothDelay</string><string>LocationServicesEnabled</string><string>SystemAudioVolume</string><string>SystemAudioVolumeDB</string><string>SystemAudioVolumeSaved</string><string>bluetoothActiveControllerInfo</string><string>bluetoothInternalControllerInfo</string><string>flagstate</string><string>fmm-computer-name</string><string>nvda_drv</string><string>prev-lang:kbd</string></array><key>8BE4DF61-93CA-11D2-AA0D-00E098032B8C</key><array><string>Boot0080</string><string>Boot0081</string><string>Boot0082</string><string>BootNext</string><string>BootOrder</string></array></dict><key>WriteFlash</key><true/></dict><key>PlatformInfo</key><dict><key>Automatic</key><true/><key>CustomMemory</key><false/><key>Generic</key><dict><key>AdviseWindows</key><false/><key>MLB</key><string>C02536100QXGDQPJA</string><key>ProcessorType</key><integer>1797</integer><key>SystemMemoryStatus</key><string>Auto</string><key>ROM</key><data></data><key>SpoofVendor</key><true/><key>SystemProductName</key><string>MacBookPro11,4</string><key>SystemSerialNumber</key><string>C02QC0HZG8WN</string><key>SystemUUID</key><string>D28B7C1F-1CF2-43F6-8471-0D6C9B3DE7A6</string></dict><key>UpdateDataHub</key><true/><key>UpdateNVRAM</key><true/><key>UpdateSMBIOS</key><true/><key>UpdateSMBIOSMode</key><string>Create</string></dict><key>UEFI</key><dict><key>APFS</key><dict><key>EnableJumpstart</key><true/><key>GlobalConnect</key><false/><key>HideVerbose</key><true/><key>JumpstartHotPlug</key><false/><key>MinDate</key><integer>0</integer><key>MinVersion</key><integer>0</integer></dict><key>Audio</key><dict><key>AudioCodec</key><integer>0</integer><key>AudioDevice</key><string>PciRoot(0x0)/Pci(0x1b,0x0)</string><key>AudioOut</key><integer>0</integer><key>AudioSupport</key><false/><key>MinimumVolume</key><integer>20</integer><key>PlayChime</key><false/><key>VolumeAmplifier</key><integer>0</integer></dict><key>ConnectDrivers</key><true/><key>Drivers</key><array><string>HfsPlus.efi</string><string>OpenRuntime.efi</string></array><key>Input</key><dict><key>KeyFiltering</key><false/><key>KeyForgetThreshold</key><integer>5</integer><key>KeyMergeThreshold</key><integer>2</integer><key>KeySupport</key><true/><key>KeySupportMode</key><string>Auto</string><key>KeySwap</key><false/><key>PointerSupport</key><false/><key>PointerSupportMode</key><string>ASUS</string><key>TimerResolution</key><integer>50000</integer></dict><key>Output</key><dict><key>ClearScreenOnModeSwitch</key><false/><key>ConsoleMode</key><string></string><key>DirectGopRendering</key><false/><key>ForceResolution</key><false/><key>IgnoreTextInGraphics</key><false/><key>ProvideConsoleGop</key><true/><key>ReconnectOnResChange</key><false/><key>ReplaceTabWithSpace</key><false/><key>Resolution</key><string>Max</string><key>SanitiseClearScreen</key><false/><key>TextRenderer</key><string>BuiltinGraphics</string><key>UgaPassThrough</key><false/></dict><key>ProtocolOverrides</key><dict><key>AppleAudio</key><false/><key>AppleBootPolicy</key><false/><key>AppleDebugLog</key><false/><key>AppleEvent</key><false/><key>AppleFramebufferInfo</key><false/><key>AppleImageConversion</key><false/><key>AppleImg4Verification</key><false/><key>AppleKeyMap</key><false/><key>AppleRtcRam</key><false/><key>AppleSecureBoot</key><false/><key>AppleSmcIo</key><false/><key>AppleUserInterfaceTheme</key><false/><key>DataHub</key><false/><key>DeviceProperties</key><false/><key>FirmwareVolume</key><false/><key>HashServices</key><false/><key>OSInfo</key><false/><key>UnicodeCollation</key><false/></dict><key>Quirks</key><dict><key>DeduplicateBootOrder</key><true/><key>ExitBootServicesDelay</key><integer>0</integer><key>IgnoreInvalidFlexRatio</key><true/><key>ReleaseUsbOwnership</key><false/><key>RequestBootVarRouting</key><true/><key>TscSyncTimeout</key><integer>0</integer><key>UnblockFsConnect</key><false/></dict><key>ReservedMemory</key><array></array></dict>
</dict>
</plist>

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