> For the complete documentation index, see [llms.txt](https://internet-install.gitbook.io/macos-internet-install/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://internet-install.gitbook.io/macos-internet-install/firmware-changes.md).

# Firmware changes

Now depending on your computer motherboard make sure of:

For Desktops:

* XHCI Handoff: Enabled (if applicable, some may not have this option)
* OS Type: Other (if applicable)
* Secure Boot: Disabled (refer to google or your motherboard's manual on how to disable it)
* Legacy/CSM support: Disabled \[if you see a garbled screen, enable this]
* If you have an Nvidia/AMD GPU:
  * NO DISPLAY is connected to the motherboard's DP/HDMI/VGA/DVI ports
  * under System Agent (SA) \[or some other menu], Graphics Settings, Main Display: PEG or PCIE
  * Disable anything like: Hybrid Graphics, Dual Graphics, DVMT size ... that are related to Intel GPU
* If you have Intel GPU:
  * make sure your DVMT pre-alloc (not to be confused with DVMT size), is set to 64MB (or higher, 64 is enough), DMVT size/apertures/whatever, to the max.

For laptops:

* make sure you have Secure Boot Disabled
* TMP/Security Chips/Security modules Disabled (if possible, it may be enabled later on)
* DVMT-prealloc to 64MB (if possible, not to be confused with DVMT size/aperture/whatever, however it may be seen as Graphics Memory)
* move from RAID/IDE to AHCI (if applicable)
* Disable the external GPU (if possible)
* Enable USB Legacy support (on some cases)
* Disable fast boot
* Disable LAN/WLAN/WWAN boot/wake
* Disable USB wake