# Embedded Controller · GitBook

> Last modified: Thu Jun 18 2020 03:09:33 GMT+0000 (Coordinated Universal Time)

# Fixing Embedded Controller (SSDT-EC/USBX)

- Fixing Embedded Controller (SSDT-EC/USBX)
  - What this SSDT does
  - Methods to make this SSDT

## What this SSDT does

The purpose of SSDT-EC/UBX is a couple things:

- On desktops, the EC(or better known as the embedded controller) isn't compatible with AppleACPIEC driver, to get around this we disable this device when running macOS
- AppleBusPowerController will look for a device named `EC`, so we will want to create a fake device for this kext to load onto
  - AppleBusPowerController also requires a USBX device to supply USB power properties for Skylake and newer, so we will bundle this device in with the EC fix
- On laptops, the EC is used for hotkeys and battery so disabling this isn't all too ideal. Problem is our EC's name isn't compatible, so we will create a simple "fake" EC device that will satisfy Apple

So TL;DR:

- EC is embedded controller
- Desktops will want real EC off, and a fake EC created
- Laptops will just want an additional fale EC present
- Skylake and newer devices will want USBX as well

## Methods to make this SSDT

For the EC fix, there are 3 methods you can choose from:

- Prebuilt
  - The prebuilt for desktops are very bloated. It's recommended to use the two methods below.
  - The Laptop prebuilts are easily usable.
- SSDTTime
  - Note this method does not support laptops, servers or HEDT systems
- Manual

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