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@eC//FrEaK You can also go into the Info.plist of the USB port kext and change every instance of MBP11,1 to MacBookPro12,1

If you use a USBPorts kext previously created with a different SMBIOS, yes, that's perfectly normal. Why? Because your mapping of USB ports no longer matches what you created. So you either: 1) revert to MBP11,x SMBIOS you previously used and add boot arg -no_compat_check or: 2) re-create your USBPorts kext with hackintool.

Try replacing with these files Add patches for Fn key for Brightness Add patches to disable unused ports, known to cause lag if you have i3 cpu Add patch to enable VGA, may or may not work E5540_Fixes.zip