DSDT.aml (Differentiated System Description Table) is a file used to tell OS X how to locate and enable features of your computer mainboard without checking of BIOS. It can be placed at the root of your system hard drive or in /Extra folder which depends on your installation method.
It’s possible to tweak Os X system in all sorts of ways by changing lines of code in the DSDT.aml file. Unfortunately, you can’t just open this file in TextEdit. First you must extract your DSDT.aml, convert it to DSDT.dsl, then edit it and recompile it to DSDT.aml. To make it easy there is a GUI application that allows you to do all of this in one editor.
DSDT.aml (Differentiated System Description Table) is a file used to tell OS X how to locate and enable features of your computer mainboard without checking of BIOS. It can be placed at the root of your system hard drive or in /Extra folder which depends on your installation method. After installing macOS the first thing you need to do is patching dsdt because patching dsdt eliminates so many errors. But patching dsdt is not an easy task and the guides available on the internet are so difficult to understand even I was unable to understand after 4-5 times.
Wiki
The DSDT (Differentiated System Description Table) is the main table in the ACPI part of a computer's BIOS.
The Advanced Configuration and Power Interface (ACPI) defines a large number of tables that provide the interface between an ACPI-compliant operating system and system firmware. These allow description of system hardware in a platform-independent manner in ACPI Machine Language (AML).
The Advanced Configuration and Power Interface (ACPI) defines a large number of tables that provide the interface between an ACPI-compliant operating system and system firmware. These allow description of system hardware in a platform-independent manner in ACPI Machine Language (AML).
The problem is that OS X has an incomplete ACPI implementation which supports only a subset of DSDT. Modifying the DSDT allows the user to better support their hardware. For example, fixing Time Machine and the UUID 35 error is possible after modifying the DSDT.
To patch your DSDT, you must either use a new table file that someone else has provided, or extract and modify your own. Then tell your bootloader to use the new DSDT file instead of the BIOS. On a few motherboards it is also possible to replace the BIOS with an updated BIOS with a patched DSDT.
Preparations
- Setting Up on Windows
Install AIDA64
AIDA64 is a system information, diagnostics, and auditing program that runs on Microsoft Windows operating systems. It displays detailed information on the components of a computer. Information can be saved to file in formats such as HTML, CSV, or XML. Download and install AIDA64 from official website www.aida64.com
Open AIDA64 → Right Click → ACPI Tool → Save DSDT → Save DSDT As acpi_dsdt.bin
Save Table → Save SSDT As acpi_ssdt-1.bin, acpi_ssdt-2.bin, ...
Video Debug → Video BIOS dump
Rename File
- Setting Up on OS X
Install DSDT Editor For Mac and Chameleon Wizzard on OS X. Note that DSDT Editor need to have Java Run Time support.
Use open DSDT Editor For Mac acpi_dsdt.aml, press F5 to compile, click Fix Errors, can't have Errors, Warning and Remarks can be temporarily ignored. No Error, save as DSDT.aml, use the same method to create SSDT.
- Chameleon Wizzard Basic Setting
Dsdt For Mac Os X 10.13
Put
DSDT.aml
, SSDT.aml
, and graphics rom to /Extra
floder.Download
Dsdt For Mac Os X 10.10
Chameleon Wizard v4.3.2.zip
DSDTEditor_Mac.zip
DSDTEditor_Mac.zip