Add way to get wifi on the live iso in case of T2 Macs

src/content/docs/installation/installation_t2macbook.mdx

@@ -12,8 +12,37 @@ import { Tabs, TabItem, Steps } from '@astrojs/starlight/components';
 CachyOS provides out of the box support for the T2 MacBook. The required kernel patches are shipped in all the kernels provided by CachyOS.
 
 **WiFi connection** is **not available** out of the box because it is a closed source firmware, which CachyOS is not allowed to redistribute.
-The installation will only work with a LAN connection. WiFi support can be set-up after the installation.
-See [installation of the firmware](#installation-of-the-firmware)
+The installation needs internet to proceed, so either use a LAN network, or follow [this section](#getting-wifi-firmware-for-the-installation) to get WiFi firmware.
+
+### Getting WiFi firmware for the installation
+
+<Steps>
+
+1. First boot into macOS and run this command:
+    ```sh
+    curl -sL https://wiki.t2linux.org/tools/firmware.sh | bash -s copy_to_efi
+    ```
+
+2. Now boot into the CachyOS ISO. Open Konsole there, and run these commands:
+    ```sh
+    sudo mkdir -p /tmp/apple-wifi-efi
+    sudo mount /dev/nvme0n1p1 /tmp/apple-wifi-efi
+    bash /tmp/apple-wifi-efi/firmware.sh get_from_efi
+    sudo umount /tmp/apple-wifi-efi
+    ```
+
+3. Setup `iwd` as backend for NetworkManager. You can run the following commands in Konsole to do so:
+    ```sh
+    cat <<EOF | sudo tee /etc/NetworkManager/conf.d/wifi_backend.conf
+    [device]
+    wifi.backend=iwd
+    EOF
+    sudo systemctl restart NetworkManager
+    ```
+
+</Steps>
+
+Now you can connect to a WiFi network and proceed with the installation.
 
 ### Proceeding with Installation
 
@@ -68,4 +97,4 @@ sudo modprobe -r brcmfmac
 sudo modprobe brcmfmac
 ```
 
-The firmware can also be extracted from an ISPW file, see the [t2linux wiki page](https://wiki.t2linux.org/guides/wifi-bluetooth/)
+For more ways to get the firmware, see the [t2linux wiki page](https://wiki.t2linux.org/guides/wifi-bluetooth/)