just finished to install El Cap on my Latitude D630 with nVidia graphics, followed the guide to the T and the system works like charm!
Running 10.11.6 and also installed the most recent patch. Apps store working, sleep working, WiFi working (with compatible BRCM module), external USBs working, VGA external display working, can't ask for more.
Remaining gap: MocOS does not pick up Bluetooth internal, will likely use external dongle for the time being.
I want to sincerely share my appreciation for the great work of the masterminds behind this forum!