SamAndrew Posted December 2, 2010 Share Posted December 2, 2010 Hello everyone, I have 10.6.3 installed on my Dell Optiplex 755 (Quad2Core, 4gb ram). Since I am very new to this, I do not know how to manually install kexts. So I used the KextInstaller program (believe I found it on this site). It worked well for my network card (at least at firsrt), but now I am getting errors saying: "System extension cannot be used The system extension "/System/Library/Extensions/AppleIntel82566.kext" was installed improperly and cannot be used. Please try reinstalling it, or contact the product's vendor for an update." I am also getting a similar error for the power management kext I installed. The biggest problem is that OS X is just very glitchy. I had a real G4 ppc and it *never* had problems like this, so I know it's something I've done wrong on the OSx86 end. Would updating to 10.6.4 help this?? Please help, thank you very much in advance!!! Quote Link to comment Share on other sites More sharing options...
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