clover引导显卡 ATI 5550/6750 显存只有5MB
10.9.4 GPT分区 clover引导能识别显卡但是显存只有5MB 换ATI 5550和6750都一样！<?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">
<plist version="1.0">
<dict>
<key>ACPI</key>
<dict>
<key>DSDT</key>
<dict>
<key>Debug</key>
<false/>
<key>DropOEM_DSM</key>
<false/>
<key>ReuseFFFF</key>
<false/>
</dict>
<key>SSDT</key>
<dict>
<key>DropOem</key>
<true/>
<key>Generate</key>
<dict>
<key>CStates</key>
<true/>
<key>PStates</key>
<true/>
</dict>
</dict>
</dict>
<key>Boot</key>
<dict>
<key>Arguments</key>
<string>arch=x86_64 dart=0 Kernel=mach_kernel</string>
<key>DefaultVolume</key>
<string>Mac</string>
<key>Legacy</key>
<string>PBR</string>
<key>Log</key>
<false/>
<key>Secure</key>
<false/>
<key>Timeout</key>
<integer>5</integer>
<key>XMPDetection</key>
<string>No</string>
</dict>
<key>Devices</key>
<dict>
<key>USB</key>
<dict>
<key>FixOwnership</key>
<false/>
<key>Inject</key>
<false/>
</dict>
<key>UseIntelHDMI</key>
<false/>
</dict>
<key>GUI</key>
<dict>
<key>Language</key>
<string>zh_cn:0</string>
<key>Mouse</key>
<dict>
<key>DoubleClick</key>
<integer>500</integer>
<key>Enabled</key>
<false/>
<key>Speed</key>
<integer>7</integer>
</dict>
<key>Scan</key>
<true/>
<key>ScreenResolution</key>
<string>1920x1080</string>
</dict>
<key>Graphics</key>
<dict>
<key>DualLink</key>
<integer>1</integer>
<key>Inject</key>
<dict>
<key>ATI</key>
<true/>
<key>Intel</key>
<false/>
<key>FBName</key>
<string>Redwood</string>
</dict>
<key>ig-platform-id</key>
<string>0x08000931</string>
</dict>
<key>KernelAndKextPatches</key>
<dict>
<key>AppleRTC</key>
<false/>
<key>KernelPm</key>
<true/>
</dict>
<key>SMBIOS</key>
<dict>
<key>BiosReleaseDate</key>
<string>04/22/11</string>
<key>BiosVendor</key>
<string>Apple Inc.</string>
<key>BiosVersion</key>
<string>MBP81.88Z.0047.B0E.1104221557</string>
<key>Board-ID</key>
<string>Mac-94245B3640C91C81</string>
<key>BoardManufacturer</key>
<string>Apple Inc.</string>
<key>ClassisManufacturer</key>
<string>Apple Inc.</string>
<key>Family</key>
<string>MacBook Pro</string>
<key>Manufacturer</key>
<string>Apple Inc.</string>
<key>ProductName</key>
<string>MacBookPro8,1</string>
<key>SerialNumber</key>
<string>C02H8456DH2G</string>
<key>Version</key>
<string>1.0</string>
</dict>
<key>SystemParameters</key>
<dict>
<key>InjectSystemID</key>
<true/>
</dict>
</dict>
</plist>
ATI显卡不能像NV卡那样简单更换，因为ATI显卡能否完美驱动取决于它的ID和核心架构是否在Mac系统默认驱动里已经包含才能“免驱”。最简单的办法是在WIN下用GPUz软件测试一下显卡的ID和核心代号，对应Mac系统原生驱动（在/S/L/E下的AMD5000\AMD600Controller.kext和AMDRadeonX3000.kext）里是否有此ID，有就是免驱的，没有就用替换法替换ID。包括config部分要做相应修改......
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