I have figure out how to make this NIC use the native kexts without any modification of the NIC firmware as suggested in other threads.
Add the following to Clover config:
And the following to the KextsToPatch section:
Intel 82574L
Add the following to Clover config:
Code (Text):
<key>ForceKextsToLoad</key>
<array>
<string>\System\Library\Extensions\IONetworkingFamily.kext\Contents\PlugIns\Intel82574L.kext</string>
</array>
<array>
<string>\System\Library\Extensions\IONetworkingFamily.kext\Contents\PlugIns\Intel82574L.kext</string>
</array>
Code (Text):
<key>KextsToPatch</key>
<array>
<dict>
<key>Comment</key>
<string>Remove IOPCISecondaryMatch</string>...
<array>
<dict>
<key>Comment</key>
<string>Remove IOPCISecondaryMatch</string>...