Hi,
I now 5 month try to get running El Capitan on my E6220. No success. Yosemite (10.10.5) with Clover installation in the ESP does run well for 18 month on that Notebook.
Spec:
Intel i5-2540
16 GB RAM
WiFi Dell 1510
WWAN Dell 5550
Could someone upload his EFI-directory for Clove...